30
Symptom/Problem
What You Can Do
Reference Pages
Unit not operating.
Check status/fault lights.
32, 33, 34
Unit not heating or cooling adequately.
Check fi lter and status/fault lights.
33, 33, 34
Unit just “hums” and doesn’t heat or cool.
Disconnect power. Call for service.
Electric bills too high.
Is unit always in Emergency Heat?
35
Is thermostat set to Continuous Fan when
using PSC blower?
35
One room is too cold/hot.
Check for closed registers and
disconnected duct.
37, 39
Too much air fl ow.
Check for closed registers in other areas.
37
Whistling noise coming from fan.
Check fi lter.
34
Loop has been damaged.
Turn off unit at breaker. Call for service.
35
Thermostat settings “mysteriously” change.
Check setpoints for both heating and cooling.
20
Red LED on at thermostat.
Check status/fault lights on unit.
See thermostat instructions.
32 - 33
25
Red LED on or fl ashing at unit.
Determine fault condition by noting which
light is on.
32, 33, 34
Drain light is fl ashing.
Check condensate pan and drain.
33, 34
TROUBLESHOOTING
In the event that your unit is not functioning properly, check the fault lights and troubleshooting information below. After
determining that a service call is required, call your dealer for an appointment. When calling the dealer, it is benefi cial to
provide your model number (see inside front cover or page 41) and indicate any fault lights that are "on" either at the unit
or on the thermostat.
Troubleshooting Reference
TROUBLESHOOTING
