20
SYMPTON
POSSIBLE CAUSE
Evaporator coil partially frosted.
1. System low on refrigerant.
Evaporator completely iced.
1. Low outside temperature.
No heat.
1. No power.
2. Selector switch position.
3. Temperature control position.
4. Fan motor.
5. Heating element.
6. Selector switch.
7. Temperature control.
8. Terminals and connectors.
Fan motor will not rotate during heat cycle.
1. Thermostatic drain valve. (Water level control, if
(Heat/Cool models only.)
applicable.)
