How to call for heat and interpret a professional current measurement.
Electrical access and live measurements are for a qualified electrician. Turn off the circuit at the electrical panel before opening the box or arranging the test. Restore power for measurement only with the required electrical safety precautions.
- With the thermostat safely installed, turn it on and press Mode/Ret until the hand icon indicates Manual mode.
- Use the arrows to select a temperature above the measured temperature, within the flooring manufacturer’s limit. Leave floor protection in effect.
- Check the heating indicator. The number of flames represents heating intensity; it is not an amperage reading or a guarantee of full output after a fixed delay.
A qualified electrician can measure AC load current with a suitably rated clamp meter around one insulated load conductor, following the meter’s safety instructions. Clamping around both outgoing and returning conductors can cancel the reading. Compare the reading during an ON period with the heating product’s rated current at the installed voltage. Do not use a household multimeter’s current input as a substitute for a correctly rated clamp.
Restore the normal setpoint and operating mode after the test. Zero current needs further diagnosis of the supply, control, protection and heating circuit; it alone does not identify a failed thermostat.
Sources: TH115-AF-GA owner’s guide (pages 2, 5 and 17), SmartStat programming guide, and Fluke clamp measurement guidance.