Honeywell CT1802 - User Manual

Questions and Answers

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Sandra GillAug 16, 2025
Why is my Honeywell CT1802 Thermostat not heating?
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  ericavillarrealAug 16, 2025
  If your Honeywell thermostat isn't producing heat, several factors could be the cause. The system switch might be in the OFF or COOL position; if so, move it to the HEAT position. Also, check the fuse or circuit breaker; replace the fuse or reset the breaker if necessary. Ensure the furnace power switch is ON. If your system uses a pilot flame, make sure it's lit, following the furnace manufacturer's instructions. Finally, examine the RH and W thermostat connections, ensuring the power to the furnace is off. Check for correct terminal hookups, repair any frayed or broken wires, and firmly tighten all terminal screws.
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smithshelbyAug 19, 2025
What to do if my Honeywell CT1802 Thermostat is not cooling?
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  Melanie GravesSep 12, 2025
  If your Honeywell thermostat isn't cooling, first check that the system switch is in the COOL position, not OFF or HEAT. Next, inspect the fuse or circuit breaker and replace or reset it if needed. Also, verify that the condenser switch located outdoors is in the ON position. Finally, turn off the power to the cooling system and check the Y, G, and RC thermostat connections for correct terminal hookups. Repair any frayed or broken wires and firmly tighten all terminal screws.
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Steven MillerAug 22, 2025
Why is my Honeywell CT1802 Thermostat clock not working?
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  Brittany BrownAug 22, 2025
  If the clock on your Honeywell thermostat isn't running, it might be due to missing or depleted batteries. Install batteries or replace them with two new AAA alkaline batteries.
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David SmithAug 25, 2025
What to do if room temperatures are not correct with Honeywell Thermostat?
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  Damon PriceAug 26, 2025
  If your Honeywell thermostat isn't maintaining correct room temperatures, check the positions of the thermostat setpoint levers and reset them to the desired temperatures. Also, verify the position of the subbase system switch and move it to the desired operating position.
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Jessica AndersonAug 28, 2025
What to do if rooms do not warm up at programmed time on Honeywell CT1802?
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  Patty ClarkAug 28, 2025
  If rooms aren't warming up at the programmed time using your Honeywell thermostat, the clock program for the heating system may need adjustment. Move the red pin one-half hour earlier on the program dial to allow more warm-up time.
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Wendy SummersAug 31, 2025
Why is my Honeywell CT1802 setting and thermometer reading disagreeing?
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  Samantha StoneAug 31, 2025
  If your Honeywell thermostat setting and thermometer reading don't match, ensure the thermostat is level by reinstalling the thermostat wallplate or subbase using a spirit level. Also, consider whether drafts or radiant heat are affecting the area around the thermostat.
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Anthony JeffersonSep 3, 2025
Why does the temperature change at the wrong time on my Honeywell CT1802?
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  Jacqueline FritzSep 3, 2025
  If the temperature changes at the wrong time with your Honeywell thermostat, it's likely due to incorrect placement of the program pins. Relocate the pins to the desired settings to correct this.
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Emily WestSep 6, 2025
How to fix energy savings temperature program 12 hours off on Honeywell CT1802 Thermostat?
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  Kathy AndersonSep 6, 2025
  To correct an energy savings temperature program that is 12 hours off on your Honeywell thermostat, turn the clock ahead 12 hours by moving the minute hand clockwise only.
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Larry RuizSep 9, 2025
What does it mean if heat-on time is too long on Honeywell CT1802?
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  Joe CordovaSep 9, 2025
  If the heat-on time is too long with your Honeywell thermostat, it is caused by the anticipator setting. Decrease the anticipator setting by 0.05 and observe heating system operation.
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Jared CrossSep 12, 2025
What does it mean if heat-on time is too short on Honeywell Thermostat?
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  Tammy MclaughlinSep 12, 2025
  If the heat-on time is too short with your Honeywell thermostat, it is caused by the anticipator setting. Increase the anticipator setting by 0.05 and observe heating system operation.