Honeywell CT70A - Manual (Page 4)

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TROUBLESHOOTING
Your Honeywell thermostat requires little or no attention. Most problems can generally be traced to the following:
Symptom Problem Corrective Action
Compressor doesn't
provide warm air. Equipment has compressor
protection time delay. Wait five minutes and check for heat.
System switch at OFF or COOL
position. Move switch to HEAT position.
Blown fuse or tripped circuit
breaker. Replace fuse or reset circuit breaker.
Heat pump power switch is at
OFF. Switch to ON.
Improper connections to
thermostat. With power to furnace at OFF, tighten all mounting and
terminal screws. Repair frayed or broken wires.
Defective thermostat. (Here's
how you know: Remove the
thermostat from the wall.
Disconnect wire from W1
terminal. Touch W1 wire to
terminal R. The thermostat is
defective if the compressor
starts.) Some systems have a
time delay, so allow five
minutes. See step 5. Exchange the thermostat (see Warranty).
Other. Contact a qualified service technician for assistance.
Compressor will not
stop delivering warm
air. Turn temperature setting lever
all the way down. Heater should start to cool within minutes. If not, turn off
power at the main service panel, and contact qualified
service technician.
Thermostat setting
and thermometer
reading disagree. Thermostat is not level. Recheck the thermostat position on the wall. Use level to
make sure it is level. See step 4.
Thermostat affected by drafts or
radiant heat. Contact a qualified service technician to change the
location. The thermostat should be about 5 ft [1.5m] above
the floor and on an inside wall.
Compressor doesn't
provide cool air. Equipment has compressor
protection time delay. Wait five minutes and check for cool.
System switch is in OFF or
HEAT position. Move switch to COOL position.
Blown fuse or tripped circuit
breaker. Replace fuse or reset circuit breaker.
Compressor switch (located
outdoors) is at OFF. Move switch to ON position.
Improper connections to
thermostat. With power to heat pump OFF, tighten all mounting and
terminal screws. Repair broken wires.
Defective thermostat. (Here's
how you know: Remove the
thermostat from the wall.
Disconnect wire from Y1
terminal. Touch Y1 wire to
terminal R. The thermostat is
defective if the compressor
starts. Some systems have a
time delay, so allow at least five
minutes.) See NOTE in step 5. Exchange the thermostat. See Warranty.
Other. Contact service technician for assistance.