24 69-0819
Temperature change occurs ■ Remember that the heating equipment or air conditioner comes on before the
at the wrong times comfort temperature start times so the zone will be at the desired temperature
(Continued).
when the period starts.
Heating will not come on. ■ Check the fuse or circuit breaker and replace or reset if necessary.
■ Check the switch on thermostat is set to HEAT or AUTO.
■ Allow at least five minutes for time guard protection to expire.
■ Heat pump thermostats have a built-in time delay that can add to time delays in
the heating equipment. Allow up to ten minutes after changing the setting before
the compressor starts.
■ If temperature setting is higher than current temperature, and display says HEAT
ON or SYSTEM light is on, contact your heating and air conditioning contractor.
Cooling will not come on. ■ Check the fuse or circuit breaker and replace or reset if necessary.
■ Check that switch on thermostat is set to COOL or AUTO.
■ The thermostat has a built-in time delay, which can add to time delays in the
cooling equipment. Allow up to ten minutes after changing the setting before the
air conditioner starts.
■ If temperature setting is lower than current temperature, and display says COOL
ON or SYSTEM light is on, contact your heating and air conditioning contractor.
