Specifications

Unit is Operating and Blows Evaporator Air, but the Supply Air

is not Colder than the Return Air from the Cellar

Possible Cause

Solution

Thermostat not set up properly

Compressor not operating

Condenser airflow is blocked

Head Pressure (HP) switch is open

Check thermostat setup in the manufacture’s

thermostat guide

High pressure switch open (button up) (see

below)

Remove blockage

Clean coil (if needed)

Reset HP switch – see reset instructions on

page 28

Problems Controlling Cellar Temperature

**Problems are occurring even though the unit seems to be fully operational – evaporator fan

blows air into the cellar and compressor and condenser fans run

Cellar temperature is low (below 51° when

unit is running

Possible Cause

Solution

Thermostat set too low on cooling

Thermostat not controlling temperature

Reset thermostat to higher cooling temperature

Wiring integrity compromised (shorted), replace

wiring

Cellar temperature is too cold (below 51°)

when unit is not running

Possible Cause

Solution

Too much heat loss to adjacent spaces

Increase insulation around the ductwork and

doorways

Add heater

Cellar temperature is too high, but supply

air is cold

Possible Cause

Solution

Not enough evaporator airflow

Cellar heat loads are too high

Remove blockage in supply or return

Check and clean coil

Coil frozen – shut off unit for two hours

Install additional insulation

Replace with larger sized unit