Honeywell Programmable Thermostat T4 Pro Installation Guide
Troubleshooting
If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is
blank
•
•
•
•
Check circuit breaker and reset if necessary.
Make sure power switch for heating & cooling system is on.
Make sure furnace door is closed securely.
Make sure fresh AA alkaline batteries are correctly installed
(see page 3).
Heating
•
•
Press Mode button to set system Heat (see page 5). Make
sure the desired temperature is set higher than the inside
temperature.
or cooling
system does
not respond
Press Mode button to set system Cool (see page 5). Make
sure the desired temperature is set lower than the inside
temperature.
•
•
•
•
Check circuit breaker and reset if necessary.
Make sure power switch for heating & cooling system is on.
Make sure furnace door is closed securely.
Wait 5 minutes for the system to respond.
Temperature Make sure heating and cooling temperatures are set to
settings do
not change
acceptable ranges:
•
•
Heat: 40 °F to 90 °F (4.5 °C to 32.0 °C)
Cool: 50 °F to 99 °F (10.0 °C to 37.0 °C)
“Cool On” or
“Heat On” is
flashing
•
Compressor protection feature is engaged. Wait 5 minutes
for the system to restart safely, without damage to the
compressor.
Aux heat runs
in cooling
•
For heat pump systems, verify there is not a wire attached to
W on UWP systems. See “Wiring heat pump systems” on page
4.
Cool runs with • For heat pump systems, verify there is not a wire attached to
a call for heat
W on UWP systems. See “Wiring heat pump systems” on page
4.
11
| General | Details |
|---|---|
| Name | Honeywell Programmable Thermostat T4 Pro Installation Guide |
| Make | Honeywell |
| Language | English |
| Filetype | PDF (Download) |
| File size | 1.08 MB |
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