Kenmore 795.79309.900, 795.79019.900, 795.79302.900, 795.79303.900, 795.79304.900 Service Manual

R

TOP FREEZER REFRIGERATOR

REFRIGERATOR

SERVICE MANUAL

CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

MODELS:

795.79012.900

795.79013.900

795.79014.900

795.79019.900

795.79302.900

795.79303.900

795.79304.900

795.79309.900

Sears, Roebuck and Co., Hoffman Estates, IL60179 U.S.A.

www.sears.com

CONTENTS

SAFETY PRECAUTIONS .....................................................................................................

1. SPECIFICATIONS ............................................................................................................

2. PARTS IDENTIFICATION .................................................................................................

3. DISASSEMBLY ................................................................................................................

3.1 Door ............................................................................................................................

3.2 Door switch .................................................................................................................

3.3 Fan and fan motor .......................................................................................................

3.4 Defrost control assembly .............................................................................................

3.5 Lamp ...........................................................................................................................

3.6 Control box-refrigerator ...............................................................................................

4. COMPRESSOR ELECTRICAL .......................................................................................

4.1 Compressor .................................................................................................................

4.2 PTC-Starter/ COMBO .................................................................................................

4.3 OLP (overload protector) .............................................................................................

5. CIRCUIT DIAGRAM .........................................................................................................

6. TROUBLESHOOTING ......................................................................................................

6.1 Compressor and electric components .........................................................................

6.2 PTC/ COMBO and OLP ..............................................................................................

6.3 Other electrical components .......................................................................................

6.4 Service diagnosis chart ...............................................................................................

6.5 Refrigeration cycle ......................................................................................................

7. OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER ...............................

7.1 Operation principle ......................................................................................................

7.2 Ice maker functions .....................................................................................................

8. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM ................................................

8.1 Function ......................................................................................................................

8.2 PCB function ...............................................................................................................

8.3 Resistance specification of sensor ..............................................................................

9. EXPLODED VIEW AND REPLACEMENT PART LIST ....................................................

2
3
5
6
6
6
7
7
7
7
8
8
8
9
10
11
11
12
13
14
15
16
16
17
18
18
21
22
27

SAFETY PRECAUTIONS

Please read the following instructions before servicing your
refrigerator.

1. Check the refrigerator for electrical faults.

2. To prevent electric shock, unplug before servicing.

3. Always check line voltage and amperage.

4. Use standard electrical components or cause your skin to
freeze and stick to the surfaces inside the freezer.

5. Don´t touch metal poducts in the freezer with wet hands.
This may cause frostbite.

6. Prevent water from spiling onto electric elements or the
machine parts.

- 2 -

7. Close the top door before opening the bottom door.
Otherwise, you might hit your head when you stand up.

8. When tilting the refrigerator, remove any materials on the
refrigerator, especially the glass shelves and stored food.

9. When servicing the evaporator, wear cotton gloves. This
is to prevent injuries from the sharp evaporator fins.

10. Service on the refrigerator should be performed by a
qualified technician. Sealed system repair must be
perdormed by a CFC certified technician.

1. SPECIFICATIONS

1-1 DISCONNECT POWER CORD BEFORE SERVICING
IMPORTANT RECONNECT ALL GROUNDING DEVICES.

All parts of this appliance capable of conducting electrical current are grounded. If grounding wires, screws, straps, clips,
nuts or washers used to complete a path to ground are removed for service, they must be returned to their original position
and properly fastened.

1-2 IMPORTANT NOTICE

This information is intended for use by individuals possessing adequate backgrounds of electrical, electronic and
mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage. The
manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in
connection with its use.

1-3 ELECTRICAL SPECIFICATIONS

Temperature Control (Position: MID) ............................................................................................................................................. -6°F to +8°F

Defrost Control ...................................................................................................................................................................................Automatic

Defrost Thermostat .....................................................................................................................................................................................50°F

Electrical Rating : 115VAC, 60Hz...............................................................................................................................................................1-5 A

Maximum Current Leakage ..................................................................................................................................................................... 0.5mA

Maximum Ground Path Resistance ..................................................................................................................................................0.14 Ohms

Energy Consumption

................................................................................................................................

19 cu.ft. 394
22 cu.ft. 422

kWh/yr (Energy Star)......

kWh/yr (Energy Star)

1-4 NO LOAD PERFORMANCE

Control Position: MID/MID

And Ambient of: ....................................................................... ..................................................................................................70°F

Fresh Food, °F...............................................................

Frozen Food, °F..............................................................

Percent Running Time........................................................

1-5 REFRIGERATION SYSTEM 1-6 INSTALLATION

Minimum Compressor Capacity Vacuum ...................................21 in

Minimum Equalized Pressure

@70°F......................................................................49PSIG

@90°F......................................................................56PSIG

Refrigerant R134a..................................................................

Compressor ................................................................... 700 BTU/hr

33°F to 41°F

-4°F to +4°F
25%-35%

oz

5.47

.

......................................................................................

......................................................................................

..........................................................................................

Clearance must be provided

.......................................................................................2 in

...

AT TOP
AT SIDES
AT REAR

.......................................................................................2 in

...

.......................................................................................2 in

...

for air circulation.

90°F

33°F to 41°F

-4°F to +4°F
%

%

5

0

6

4

-

- 3 -

PERFORMANCE DATA

(NORMAL OPERATING CONDITIONS)

AMB WATTS

70°F
90°F

110°F

98 (+10 / -10)
98 (+10 / -10)
103 (+5 / -5)

1-8 AIR FLOW

SYSTEM PRESSURE (PSIG)

HIGH SIDE LOW SIDE

98 (+5 / -3)
132 (+3 / -3)
180 (+5 / -5)

(-5) to (-2)

(-4) to 1
(-2) to 3

1-7 REPLACEMENT PARTS

Relay (PTC)

Overload Protector (OLP)..........

Defrost Thermostat .................

Defrost Heater ..........................

Evaporator Fan Motor .............

Capacitor ....................................

Compressor (Hi-side).................

Evaporator (Lo-side) ..................

Condenser.................................

Dryer...........................................

Condenser Fan Motor

Temperature Control..................

Main Control ...............................

...............................

.................

19 cuft

6748C-0004D

6750C-0005P
4781JK2001A
5300JK1003D
4681JK1004A
0CZZJB2012J
TCA33414101
5421JJ0003A
5403JJ1008A
5851JJ2002F
4681JB1029J
EBR59400501
EBR41531307

22 cuft

6748C-0004D

6750C-0005P
4781JK2001A
5300JK1003J
4681JK1004A
0CZZJB2012J
TCA33414101
5421JJ0002A
5403JJ1008A
5851JJ2002F
4681JB1029J
EBR59400501
EBR41531307

EVAPORATOR FAN

DRYER

COMPRESSOR

EVAPORATOR

HOT LOOP

CONDENSER

CONDENSER FAN

COLD AIR
MIXED AIR

AIR RETURN TO
EVAPORATOR

EVAPORATOR

FREEZER

CONTROL

FRESH FOOD

- 4 -

2. PARTS IDENTIFICATION

A
B

C

D
E

F

G

J

K

L

M

H

I

Use this section to become more familiar with the parts and features. Page references are included for your
convenience.

NOTE:This guide covers several different models.The refrigerator you have purchased may have some
or all of the items listed below.The locations of the features shown below may not match your model.

A

CustomCube Ice maker

Base Grille

Ice Bin

B
C

Freezer Shelf

D

Digital Sensor Control

E

Refrigerator Light

F

Snack Pan

G

Shelves
Crisper

H

Keeps fruits and vegetables fresh and crisp

I
J

Freezer Door Bin

K

Dairy Corner

L

Can Dispenser

M

Door Bin

N

Refrigerator Door Rack

O

Vitabox (Inside)*

N

O

- 5 -

*On some models

3. DISASSEMBLY

3-1 DOOR

Freezer Door

1. Remove the hinge cover by pulling it upwards.

2. Loosen hexagonal bolts attaching the upper hinge to the
body and lift the freezer door.

HINGE COVER
BOLT

HINGE

Figure 1

3. Pull out the door gasket to remove from the door foam
assembly.

GASKET

3-2 DOOR SWITCH

1. To remove the door switch, pry it out with a slotted-type
driver, as shown in (Figure 4).

2. Disconnect the lead wire from the switch.

LEAD WIRE
DOOR SWITCH

Figure 4

Figure 2

Refrigerator Door

1. Loosen hexagonal bolts attaching the lower hinge to the
body to remove the refrigerator door only.

LOWER HINGE

BOLT

Figure 3

2. Pull out the door gasket to remove from the door foam
assembly.

- 6 -

3-3 FAN AND FAN MOTOR

1. Remove the freezer shelf. (If your refrigerator has an
icemaker, unplug and remove the icemaker first).

2. Remove the screw of the cover grille fan

3. Remove the grille by pulling it out and by loosening a screw.

4. Remove the Fan Motor assembly by loosening 4 screws and
disassemble the shroud.

5. Pull out the fan and separate the Fan Motor and Bracket.

3-5 LAMP

SHROUD

FAN MOTOR

BRACKET

FAN

GRILLE

Figure 5

3-4 DEFROST CONTROL ASSEMBLY

Defrost Control assembly consists of Defrost Sensor and
FUSE–M.

Defrost sensor functions to defrost automatically. It is
attached to metal side of the Evaporator and senses
Temperature. At the temperature of 162°F(72°C), it stops
the emission of heat from the Heater.

Fuse-M is a safety device for preventing over-heating of
the Heater when defrosting.

1. Pull out the grille assembly. (Figure 6)

2. Separate the connector of the Defrost Control
assembly and replace the Defrost Control assembly
after cutting the Tie Wrap. (Figure 7)

Figure 8

3-5-1 Refrigerator Compartment Lamp

1. Unplug the power cord from the outlet.

2. Remove refrigerator shelves.

3. Release the hooks on both ends of the lamp shield and
pull the shield downward to remove it.

4. Turn the lamp counterclockwise.

5. Assemble in reverse order of disassembly. Replacement
bulb must be the same specification as the original
(Max. 40 W-1EA).

3-6 CONTROL BOX-REFRIGERATOR

1. First, remove all shelves in the refrigerator. Then remove
the Refrigerator Control Box by loosening 2 screws.

CONTROL BOX

COVER LAMP

Figure 9

GRILLE ASSEMBLY

Figure 6

DEFROST-CONTROL
ASSEMBLY

Figure 7

2. Remove the Refrigerator Control Box by pulling it
downward.

3. Disconnect the lead wire on the right position and
separate the lamp sockets.

- 7 -

4. COMPRESSOR ELECTRICAL

4-1 COMPRESSOR
4-1-1 Role

The compressor intakes low temperature and low pressure gas
from the evaporator of the refrigerator and compresses this gas
to high temperature and high pressure gas. It then delivers the
gas to the condenser.

4-1-2 Composition

The compressor includes overload protection. The PTC starter
and OLP (overload protector) are attached to the outside of the
compressor. Since the compressor is manufactured to
tolerances of 1 micron and is hermetically sealed in a dust and
moisture-free environment, use extreme caution when
repairing it.

4-1-3 Note for Usage

(1) Be careful not to allow over-current.
(2) If compressor is dropped or handled carelessly, poor
operation and noise may result.
(3) Use proper electric components appropriate to the particular
compressor in your product.
(4) Keep compressor dry.
If the compressor gets wet (in the rain or a damp environment)
and rust forms in the pin of the Hermetic Terminal, poor
operation and contact may result. If the hermetic connector
rusts out or fails, refrigerant and oil will be expelled into the
contact area, probably resulting in smoke and fire.
(5) When replacing the compressor, be careful that dust,
humidity, and soldering flux don´t contaminate the inside of the
compressor. Contamination in the cylinder may cause noise,
improper operation or even cause it to lock up.

4-2 PTC-STARTER/ COMBO

4-2-4 Role of Combo TSD

(1) The combo is attached to the sealed compressor and is used
for the operation and protect the motor.
(2) The compressor is a single phase induction motor. During
the starting and operation, the combo allows current flow to both
the start and main winding.

4-2-5 PTC/Combo - Applied Circuit Diagram
Starting Method for the Motor

COMPRESSOR
ACCESORIES

CAPACITOR PARTCAPACITOR PART

PKPK

BKBK

GNGN

/YL/YL

(GN)(GN)

PARTPART

OLPOLP

CrCr

RDRD

CsCs

44

33

BLBL

PTC
DIAGRAM

* P.T.C OPTION* P.T.C OPTION

LD,LQ COMP'LD,LQ COMP'

P.T.C P.T.C

22

66

55

SS
MM

BLBL

COMP' EARTHCOMP' EARTH

EG COMP'EG COMP'

4-2-1 Composition of PTC- Starter

(1) PTC (Positive Temperature Coefficient) is a no-contact
semiconductor starting device which uses ceramic material
consisting of BaTiO3.
(2) The higher the temperature is, the higher the resistance
value. These features are used as a starting device for the
motor.

4-2-2 Role of PTC-Starter

(1) The PTC is attached to the Sealed Compressor and is used
for starting the motor.
(2) The compressor is a single-phase induction motor. During
the starting operation, the PTC allows current flow to both the
start winding and main winding.

4-2-3 Combo TSD

TSD (Time Starting Device) is a new electronic starting system
for high efficiency compressors due to the following
characteristics:
(1) Combo concept-overload protector, electronic board and
cover in a single casing.
(2) Fully electronic concept.
(3) Full integration of starting and protection devices.
(4) Free from mechanical and electromagnetic noises.

22

44

33

COMBO KIT
DIAGRAM

* ALTERNATIVE COMP'* ALTERNATIVE COMP'

55

66

ACCESSORIESACCESSORIES

CRCR

BLBL

NN

PTCPTC

33

44

22

66

55

BKBK

LL

OLPOLP

COMBO KITCOMBO KIT
(PTC+OLP)(PTC+OLP)

- 8 -

4-2-6 Motor Resarting and PTC/ Combo Cooling

4-3-2 Role of the OLP

(1) It requires approximately 5 minutes for the pressure to
equalize before the compressor can restart.
(2) The PTC/Combo device generates hea during operation.
Therefore, it must be allowed to cool before the compressor can
restart.

4-2-7 Relation of PTC-Starter / Combo and OLP

(1) If the compressor attempts to restart before the PTC/Combo
device is cooled, the PTC/Combo device will allow current to
flow only to the main winding.
(2) The OLP will open because of the over current condition.
Thissame process will continue (3 to 5 times) when the
compressor attempts to restart until the PTC/Combo device has
cooled. The corret OLP must be properly attached to prevent
damage to the compressor.
Parts may appear physically identical but could have different
electrical ratings. Replace parts by part number and model
number. Using an incorrect part could result in damage to the
product, fire, injury, or possibly death.

4-2-8 Note for using the PTC-Starter / Combo

(1) Be careful not to allow over-voltage and over-current
(2) Do not drop or handle carelessly.
(3) Keep away from any liquid.
If liquid such as oil or water enters the PTC/Combo,
PTC/Combo materials may fail due to breakdown of their
insulating capabilities.
(4) If the exterior of the PTC/Combo is damaged, the resistance
value may be altered. This can cause damage to the
compressor and result in a no-start or hard-to-start condition.
(5) Always use the PTC/Combo designed for the compressor
and make sure it is properly attached to the compressor. Parts
may appear physically identical but could have different
electrical ratings. Replace parts by part number and model
number. Using an incorrect part could result in damage to the
product, fire, injury, or possibly death.

(1) The OLP is attached to the sealed compressor used for the
refrigerator. It prevents the motor coil from being started in the
compressor.}
(2) For normal operation of the OLP, do not turn the adjust screw
of the OLP in anyway.

(OVERLOAD PROTECTOR cross section)

Customer part
number

12345678

Lot code/
date code

Physical

termination
part number

Electrical

characteristics

part number

330 FBYY -S1 BOX98

Figure 18

4-3 OLP (OVERLOAD PROTECTOR)
4-3-1 Definition of OLP

(1) OLP (OVERLOAD PROTECTOR) is attached to the
compressor and protects the motor by opening the circuit to the
motor if the temperature rises activating the bimetal spring in
the OLP.
(2) When high current flows to the compressor motor, the
bimetal wors by heating the heater inside the OLP, and the OLP
protects the motor by cutting off the current flowing to the
compressor motor.

- 9 -

5. CIRCUIT DIAGRAM

PWB(PCB) ASSEMBLY, DISPLAYPWB(PCB) ASSEMBLY, DISPLAY

22

BNBNRDRD11PKPK33YLYL44BLBL

99 88 77 66 55 44 33 22 11

1111 1010

PWB(PCB) ASSEMBLY, MAINPWB(PCB) ASSEMBLY, MAIN

99 88 77 66 55 44 33 22 11 55 66 7711 22 33 44

BLBLYLYLBNBNSBSB BLBL

C-FANC-FAN

F-FANF-FAN

BNBN

RDRD

11 22 33 44 55 66

CON5CON5

CON4CON4

11

SBSB

22

BNBN

33

PRPR

44
55

GYGY

66

WHWH

77
88

99

1010

CON3CON3

1111 1010

112233

CON101CON101

55

66

PRPR

PRPRPKPK YLYL BLBL

CON6CON6 CON8CON8

CON1CON1 CON2CON2

BKBK

RT-SENSORRT-SENSOR

WHWH

CON7CON7

SBSB

AA BB

GYGYWHWH GYGY

11
22
33

BOBO

44

BOBO

55

WHWH
WHWH

66

77

88

BNBN

44332211

DEF-SENSORDEF-SENSOR

R-SENSORR-SENSOR

POWERPOWER

SUPPLY SUPPLY

CORDCORD

NN
LL

GN/YLGN/YL

(GN)(GN)

SBSB BNBN YLYL BLBL BLBL BKBK

CAPACITOR PARTCAPACITOR PART

PKPK

GN/YLGN/YL

(GN)(GN)

FUSE-MFUSE-M

(98(98 C)C)

VV

BKBK

MM

HEATER,HEATER,

ICE SENSORICE SENSOR

WHWH

WHWH

11

22

CON5CON5

PWB (PCB) ASSEMBLY, ICE MAKERPWB (PCB) ASSEMBLY, ICE MAKER

*PLUG TYPE,ICE MAKER PART,CAPACITOR PART, *PLUG TYPE,ICE MAKER PART,CAPACITOR PART,

P.T.C,COMP' ACCESSORIES AND COMP' EARTH PARTP.T.C,COMP' ACCESSORIES AND COMP' EARTH PART
ON CIRCUIT DIAGRAM ARE SUBJECT TO CHANGE IN ON CIRCUIT DIAGRAM ARE SUBJECT TO CHANGE IN
DIFFERENT LOCALITIES AND MODEL TYPE.DIFFERENT LOCALITIES AND MODEL TYPE.

SHEATHSHEATH

WHWH

WHWH

11

11

CON3CON3

CON4CON4

ICE MAKER PARTICE MAKER PART

MOTORMOTOR

S/WS/W

ICE MAKERICE MAKER

POWERPOWER

BKBK

BLBL

BKBK

WHWH
11

22

CON2CON2

RDRD

11

11

22

CON1CON1

CON6CON6

I/MAKER W/VALVEI/MAKER W/VALVE

CrCr

RDRD

BLBL

COMP' ACCESSORIESCOMP' ACCESSORIES

22

CsCs

44

55

33

66

P.T.C P.T.C

* P.T.C OPTION* P.T.C OPTION

LD,LQ COMP'LD,LQ COMP'

44

33

BK: BLACKBK: BLACK GN: GREENGN: GREEN GY: GRAYGY: GRAY
YL: YELLOWYL: YELLOW
SB: SKY BLUESB: SKY BLUE
BN: BROWNBN: BROWN

PK: PINKPK: PINK
BO: BRIGHT ORANGEBO: BRIGHT ORANGE
PR: PURPLEPR: PURPLE

WH: WHITEWH: WHITE
BL: BLUEBL: BLUE
RD: REDRD: RED

SBSB BNBN

SS

MM

BLBL

COMP' EARTHCOMP' EARTH

EG COMP'EG COMP'

22

44

55

66

22

comcom

comcom

ncnc

ncnc

DOOR S/W-RDOOR S/W-R

BB

AA

R-LAMPR-LAMP

BLBL

* ALTERNATIVE COMP'* ALTERNATIVE COMP'

ACCESSORIESACCESSORIES

CRCR

BLBL

NN

PTCPTC

BKBK

OLPOLP

COMBO KITCOMBO KIT
(PTC+OLP)(PTC+OLP)

BKBK

GNGN

/YL/YL

(GN)(GN)

PARTPART

33

OLPOLP

66

55

GN/YL: GREEN/YELLOWGN/YL: GREEN/YELLOW
BL/WH: BLUE/WHITEBL/WH: BLUE/WHITE
BK/WH: BLACK/WHITEBK/WH: BLACK/WHITE
RD/WH: RED/WHITERD/WH: RED/WHITE

FUSE-MFUSE-M

(72(72 C)C)

RDRD

HEATERHEATER

SHEATHSHEATH

BLBL

LL

- 10 -

6. TROUBLESHOOTING

6-1 COMPRESSOR AND ELECTRIC COMPONENTS

1

2

Power Source.

Check

Check resistance

resistance of

of motor

motor

compressor.

compressor.

.

Remove PTC-Starter/Combo
from compressor and
measure voltage
between Terminal C of
compressor and

terminal 5 or 6 of PTC/Combo

No voltage.

Applied voltage isn't
in acceptable range.
(115V ±10%)

Check the resistance
between M-C, S-C and M-S
in motor compressor.
Check each pin to ground.

(Rated voltage
±10%)?

OLP disconnected?

Advise customer that
power supply needs to be
checked by an electrician.

Open or short

or short to
ground

Replace
compressor

YES

YES

NO

The resistance between pins should be
between 1 and 50 ohms. The resistance to
ground should be infinite.

Replace OLP.

Check connection
condition.

Reconnect.

43

2

5

5

3

5

3

4

5

Check
resistance of
PTC-Starter.

Check OLP.

Check
starting state.

Check resistance of

PTC-Starter/Combo

Check resistance of two
terminals in OLP.

Check the power supply
under load.
(Compressor attempting
to re-start after being off
for 5 minutes).

Check resistance of
two terminals in
PTC-Starter/Combo

Refer to Page 16.

Supply
voltage rating
with ±10%.

YES

Did

compressor

start?

NO

Refer to Page 16.

YES

Compressor
is OK

Replace the
compressor

NO

1

- 11 -

6-2 PTC / COMBO AND OLP

Normal operation of
compressor is impossible
or poor.

65

Separate PTC-Starter/Combo

from Compressor and
measure resistance

between No. 5 and 6
of PTC-Starter with a
Tester.

(Figure 19a and figure 19b)

Separate OLP from
compressor and check
resistance value between
two terminals of OLP with a
tester.
(Figure 20)

Observation value is

115V/60Hz : 6.8 ±30%

at room temperature

The resistance value
is 0 (short) or
8(open).

Shows continuity

Open

Check another
electric component.

Replace OLP.

PTC/ Combo OK

Replace PTC­Starter/Combo

OLP OK

Figure 19a

?

Figure 20

Figure 19b

- 12 -