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CT41A HEATING/COOLING THERMOSTAT
69-0788-2 4
4 CHECK OUT THERMOSTAT
The System switch controls as follows:
Heat: heating system only operates.
Off: heating and air conditioning systems are discon-
nected.
Cool: air conditioning system only operates.
The Fan switch controls as follows:
Auto: fan operates when heating or air conditioning
system operates.
On: fan operates continuously.
NOTE: In the following instructions, disregard heating
or air conditioning directions if not applicable to
your system.
CAUTION
Compressor Damage Hazard.
Operating at too low of an outdoor
temperature can cause compressor damage.
Do not operate cooling if outdoor temperature is
below 50°F (10°C).
Allow compressor to remain off for five minutes
before restarting.
Refer to manufacturer’s recommendations.
❑ Turn on power to the heating/air conditioning system.
❑ Observe system operation for at least one cycle on
both heating and air conditioning. To observe:
❑ Place the System switch at the Heat position and the
Fan switch at the Auto position. Move the temperature
setting lever 10°F (6°C) below room temperature. The
heating equipment should turn on. A short warmup
period may be required before system fan turns on.
NOTE: Some systems have a time delay that can pre-
vent operation up to five minutes.
❑ Turn the Fan switch to On. The system fan should turn
on and operate continuously. The system blower
should continue to operate at any System switch or
thermostat setting.
5 THERMOSTAT
❑ Place the System and Fan switches at the desired
settings for operation.
6 TROUBLESHOOTING (TABLE 2)
Your Honeywell thermostat requires little or no attention.
Most problems can be resolved according to Table 2.
NOTE: If your system is heating-only or air
conditioning-only, disregard sections not
applicable to your system.