Set a safe heating demand before a qualified electrician measures load current.
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 TH114 safely installed and switched on, press an arrow to show the setpoint, then raise it above the measured temperature while staying within the flooring manufacturer’s limit. The normal display returns to measured temperature after five seconds. In AF mode, the floor-temperature limit can prevent heating even when the room calls for heat.
The flame indicator represents heating intensity, not measured amperage. There is no need to force a universal 100°F setting or expect five flames within a fixed number of seconds.
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 after the test. If the GFCI Fault light is on during normal operation, turn off the heating circuit at the panel and have an electrician check the installation.
Sources: TH114 guide and PB112 installation instructions (sections 6–8) and Fluke clamp measurement guidance.