The screen will wake up by pressing any of the three buttons. If powered by the C wire, the screen stays lit for 45 seconds after you complete changes. If powered by battery only, the screen stays lit for 8 seconds. Depending on how your thermostat was installed, the screen light may always be on.
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NOTE: Available System modes vary by model and system settings.
System modes:
– Heat
– Cool
– Off
NOTE: Available Fan modes vary with system settings.
Fan modes:
– Auto: Fan runs only when the heating or cooling system is on.
– On: Fan is always on.
Damage can occur if the compressor is restarted too soon after shutdown. This feature forces the compressor to wait for a few minutes before restarting.
During the wait time, the display will flash the message Cool On (or Heat On if you have a heat pump). When the safe wait time has elapsed, the message stops flashing and the compressor turns on.
Batteries are optional (to provide backup power) if your thermostat was wired to run on AC power when installed. If your thermostat was not wired to run on AC power, then batteries are required. Install fresh batteries immediately when the low battery icon appears. The icon appears about two months before the batteries are depleted. Even if the low battery icon does not appear, you should replace batteries once a year, or before leaving home for more than a month.
NOTE: When replacing batteries, alkaline batteries are recommended.
Electrical Ratings
Terminal | Voltage (50/60Hz) | Running Current |
W Heating | 20-30 Vac | 0.02-1.0 A |
Y Compressor Stage 1 | 20-30 Vac | 0.02-1.0 A |
G Fan | 20-30 Vac | 0.02-0.5 A |
O/B Changeover (TH1110D only) | 20-30 Vac | 0.02-0.5 A |
If you have difficulty with your thermostat, please try the following suggestions. Most problems can be corrected quickly and easily.
Display is blank |
|
Heating or cooling system does not respond |
|
Temperature settings do not change |
|
“Cool On” or “Heat On” is flashing |
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CAUTION: ELECTRICAL HAZARD Can cause electrical shock or equipment damage. Disconnect power before beginning installation. | |
CAUTION: EQUIPMENT DAMAGE HAZARD Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly | |
CAUTION: MERCURY NOTICE If this product is replacing a control that contains mercury in a sealed tube, do not place the old control in the trash. Contact your local waste management authority for instructions regarding recycling and proper disposal. | |
CAUTION: ELECTRONIC WASTE NOTICE The product should not be disposed of with other household waste. Check for the nearest authorized collection centers or authorized recyclers. The correct disposal of end-of life equipment will help prevent potential negative consequences for the environment and human health |
Download Manual:
Honeywell T1 Pro Non-Programmable Thermostat User Guide
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Honeywell T1 Pro Non-Programmable Thermostat Installation Instructions
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