Reset control by pressing start button for 1 second and releasing. Then press again the same way
to attempt a normal start command. Repeat up to 10 times as necessary to see if this overcomes
the issue as it may resolve itself eventually.
Check to see if gas is present at gas appliance inlet. (Check gas supply is on, the gas line purged of
air and the supply pipework is free of blockages or contamination)
Rectify and perform start
cycle to clear the Error code.
Try to light the fire as normal.
No gas on appliance
inlet
Clean the pilot free of any dirt, dust carbon granules or lint, especially around the brass body of the
bunsen burner and its gas and electrical connection and the area around the flame ports and the
spark plug and electrode tip. Check the electrode gap is 3- 4 mm.
Rectify and perform start cycle
to clear the Error code. Try to
light the fire as normal.
Replace pilot if necessary
Pilot contaminated with
lint or other materials
Check ignition cable for damage and listen and watch for tracking out of spark to see if it is present
but not making it to the electrode tip on the pilot burner.
If cable damaged, replace
cable. Reset error by
p
erforming a normal start
cycle and try to start again.
Replace pilot if necessary.
Reset and try again
Reset and try again
No Spark at Electrode
(fire not igniting pilot
b
urner)
Clear pipe and consider changing pilotPilot pipe or pilot injector
c
ould be blocked)
E00
Code Comment Apperance Possible Cause Action
TESC locked due to
failed ignition
Red Led is
permanently on
TESC unit ( and
E
00 on handset, if
used)
Temporary air
disturbance around pilot
burner
C
heck pilot pipe, check flame appearance of pilot flamesE01 Low current from
thermocouple but
f
lame: possibly CO
alarm
F
lashing Red LED
on TESC Control
P
ilot pipe blocked - no
gas reaching pilot
b
urner
Occurs if started ok then subsequently loss of thermocouple current. Check for flue problems. Fire
cuts out to prevent over heating
E02 Too high ambient
temperature ( >73 °C)
a
round control
Negative flue pull or
blocked flue or similar
Reset and try again
C
heck if connected correctly and terminations are sound
E03 No, defective, or bad
c
onnected
thermocouple
B
ad connection
R
eset and try againSensing flame on pilot when no flame should be there. Investigate.E04 False flame signal Occurs during stopping
fire
Reset and try againReplace batteriesE06 Too low voltage on
p
ower supply to start
the burner
Weak or old or defective
b
atteries
R
eset and try again
R
eplace batteries / power adaptor
E
07 Power supply
breakdown during
peak current
consumption
C
heck/change all the
batteries or check power
adaptor. : Note always
change all batteries
together never only 1 or 2
Reset and try againReplace if necessaryE08 Error caused by
external pressure
s
witch
Check the pressure
switch
Reset and try againCheck pressure switch connections, check to see if jumpers are in place on back of TESC.E09 Error caused by
external pressure
switch
Pressures switch action
connection or jumpers
missing or not connected
properly
Reset and try againCheck pressure switch connections, check to see if jumpers are in place on back of TESC.E10
Error caused by
external pressure
switch
Pressure switch action
connection or jumpers
missing or not connected
properly
Reset and try againCheck switch for damage, contamination across terminals or damaged wiring. Disconnect wired
thermostat if fitted and try a start, if it works replace thermostat
E11 Short circuit on wired
thermostat (if used)
Check switch
Reset and try again
Check switch for damage, contamination across terminals or damaged wiring. Disconnect wired
thermostat if fitted and try a start, if it works replace thermostat
E12 Open circuit on wired
thermostat (if used)
Check wiring and
thermostat
Reset and try againCheck switch for damage, contamination across terminals or damaged wiring. Disconnect wired
thermostat if fitted and try a start, if it works replace thermostat
E13 Wired thermostat is
out of tolerance
Check wiring and
thermostat
Reset and try againClean as necessary. Replace switch panel as necessary if damaged or too contaminated.
disconnect wired control panel and try again – if it works replace wired control panel
E14 Button (-) sticks
either on TESC or on
wired control panel (if
used)
Check for contamination
around buttons
Reset and try againClean as necessary. Replace switch panel as necessary if damaged or too contaminated.
disconnect wired control panel and try again – if it works replace wired control panel
E15 Button (+) is shorted
to other buttons
either on TESC or on
wired control panel (if
used)
Check for contamination/
damage
Reset and try againClean as necessary. Replace switch panel as necessary if damaged or too contaminated.
disconnect wired control panel and try again – if it works replace wired control panel
E16 Button (ON/OFF) is
shorted to other
buttons either on
TESC or on wired
control panel (if used)
Check for contamination
/ damage and replace
wired switch panel if
necessary
Reset and try againJumpers on back of
v
alve missing
Check to see if jumpers
a
re in 10 way connector
Reset and try again
Check and clean around the area of the pilot for lint and other contamination. Check where the
thermocouple connects to the TESC control for the same contamination. Clean these areas.
E05
False flame signal Flame sensing on pilot
before start of ignition
sequence or after valve
h
as shut off.
Contamination of
e
lectrode to ground
Reset and try againReplace PilotDefective thermocouple
Check and clearBlocked flue
Reset and try again
C
heck manual for correct placementPoor position of
Ceramic parts
C
heck flueChimney blocked
causing Co / Co2 to
b
uild up in the room
build
Change pilot or thermocouplePilot thermocouple
d
efective / old
Clear error and restart to check ignition okPossible temporary air
d
isturbance on pilot
flame