EasyHeat Reference Guide: Warm Tiles Troubleshooting Suggestions for Cables and Thermostats, TSHCS-FW01 Manuals & Guides

Problem

Possible Cause

Suggested Correction

Display is blank / Illegible /
Unwanted characters showing

No power to thermostat

Restore power supply

FG and FGS models:
The pins are not aligned and not properly

inserted. (see Figure 2 on page 4)

FG and FGS models:
Align the thermostat power base; Hook the Front

Panel unit to the top of the Power Base unit, swing
down and press the Front Panel into the Power
Base unit slightly. Tighten the screw at the bottom of
the unit.
(See Figure 3 on page 4)

Power disturbance / interruption

See Step 1 on page 2.

Can't adjust the temperature setting /
time

Power disturbance / interruption

See Step 1 on page 2.

Button Failure

Replace thermostat

ER 02 on display

Program cannot run with time setting proposed
due to conflict of time (e.g. Leave time occurs
after Return time)

Adjust program time to eliminate conflict

Test button won't cause thermostat
to trip

Thermostat is in "Standby” mode.
(Heating Symbol icon flashing slowly)

Wait 3 minutes, until Heating Symbol icon stops
flashing and is on continuously

GFI flashing on LCD display

Ground Fault detected by thermostat

Press reset button on thermostat. If fault does not
clear, switch to OFF mode, call service technician or
Contact Easy Heat Technical Support.

Cold/Hot floor
Floor temp set too low/high.

Increase/decrease floor temp setting.

Clock not set properly

Check Time of Day settings, watch for AM/PM

Floor temp won't reach set level

Program Set Time may be off.

Check program settings, watch for AM/PM.

Heat up time may be longer than one hour.

Set cables to come on earlier than current program

Cables may not be able to reach set level due
to room heat loss

Reduce source of heat loss such as open windows,
insulate floor directly under cables

Cable problem

Cables must be checked - see additional
suggestions below

Floor heating doesn't turn on

Thermostat is in OFF mode

Switch to ON, or Manual or Auto Mode.

Power supply problem

Check breaker panel and wiring

Problem with sensor wire, "Sensor" flashing on
LCD display

Sensor and/or connections to thermostat must be
checked. See also Step 3 on Page 2.

For FG and FGS models:
Ensure pins are aligned and properly inserted.
(see Figure 2)

Cable problem

Cables must be checked - see additional
suggestions on next page

Troubleshooting Suggestions for Cables and Thermostats

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2017-06-08

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TSHCS - FW01 Rev 0

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Note: A qualified Electrician, Digital Multimeter and Mega ohmmeter will be needed for Steps 2
through 5.

Step 1

To reset the Warm Tiles thermostat to factory default settings, turn off the circuit breaker in the electrical panel that
supplies the Warm Tiles installation. Leave the circuit breaker off for 20 to 30 minutes. This will restore the Warm Tiles
thermostat to the factory default settings. Then turn the circuit breaker back on and reset the thermostat custom
temperature setting. Observe the thermostat operation to see if the thermostat is working properly. You should be able to
adjust the thermostat setting and observe the floor temperature change.

Step 2

If Step 1 does not correct the problem, measure the supply voltage at the Warm Tiles thermostat. The supply voltage
should be within 5% of the thermostat rated voltage. Also, the output voltage of the Warm Tiles thermostat should be
measured and be within 5% of the thermostat rated voltage. Output voltage should match input voltage. To do this,
turn off the circuit breaker in the electrical panel that supplies the Warm Tiles installation. Then remove the Warm Tiles
heater cable leads from the Warm Tiles thermostat. Turn the circuit breaker back on and switch the thermostat to the
manual position or the ON position for a nonprogrammable thermostat. When the thermostat heating symbol (Three wavy
lines) appears on the LCD screen of the thermostat without flashing, measure the thermostat input and output voltage. If
the heating symbol is flashing on the LCD screen, wait a few minutes for it to stop flashing then conduct the voltage tests.
Please refer to Figure 1 on page 3 for thermostat wiring. An alternate method of testing the thermostat is to change out
the questionable thermostat with a properly functioning thermostat. If the properly functioning thermostat operates
correctly and the floor temperature change is observed, the questionable thermostat should be replaced with a new Warm
Tiles thermostat.

Step 3

Check the thermostat floor temperature sensor cable by disconnecting the floor sensor cable from the thermostat,
measure the sensor cable resistance in ohms using a digital multimeter. With the digital multimeter scale set at 20K-ohms,
the ohms reading of the sensor wire should be between 7,000 ohms to 14,000 ohms. If the sensor cable measurement
is outside the resistance range, the sensor cable should be replaced. When replacing the sensor cable, position the
sensor bulb equally between two Warm Tiles heater cables.

Step 4

To identify the model number of the cable/mat that is installed in the existing floor, check the factory identification tag
attached to the cold lead of the Warm Tiles cable/mat, retained within the junction box or electrical connection box, behind
the thermostat. The factory identification tag lists the model number of the cable/mat and its resistance value. If the factory
identification tag is missing, measure the resistance (in ohms) of the heating cable/mat using a digital multimeter and
compare the measured resistance to the Warm Tiles tables on the following pages. Also, the Warm Tiles tables list the
cable/mat total length, recommended heated square footage and electrical specifications. This information can be used to
identify the cable/mat installed in the floor and evaluate the condition of the Warm Tiles system.

Step 5

To check the Warm Tiles cable/mat for ground fault conditions, measure the insulation value of each cable conductor to
the ground braid using a mega-ohmmeter at 500 VDC. The Warm Tiles cable/mat conductor insulation measurement
should be 10 mega-ohms or higher. A low mega-ohmmeter reading may indicate physical damage to the Warm Tiles
cable/mat during installation.

TSHCS - FW01 Rev 0

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Figure 1: Warm Tiles Thermostats

Heating Cable

To ECB

Power Supply

Heating Cable

To ECB
Sensor

Power

To Ground Connection
Sensor

Heating Cable

Power Supply Cable

Sensor

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Ground Screw

Cold Leads

(a) ET and FTS

Wire

Ground Screw

Cold Leads

(b) GT and GTS

Wire

Supply

Cold Lead

(c) FG and FGS

Wire

TSHCS - FW01 Rev 0

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