Confirm there is enough power being supplied to operate your electric floor heating system.
Warmup recommends that your floor heating system be placed on a dedicated, 20 amp circuit to power your heating system. If your electrical panel does not have room for a dedicated circuit, you must make sure that the existing circuit breaker can handle the additional load required to power the floor heating system(s). Your electrician will be able to make this determination and offer power options.
Please verify that the circuit can handle the amount of amperage your heating system requires. Your thermostat can only handle up to 15amps, any more than that and you will need to have your electrician install a relay. Yourself or your electrician can find out the amperage rating of your specific floor heating system on page 6 of the installation manual.
Contact your reseller/installer for details regarding your particular configuration.