SOURCE: Honeywell digital thermostat won't turn off ac.
The Honeywell CT87 thermostat is a normal round thermostat, not digital and may have a sub-base installed with it that has a two switches on it. One is for Fan (Auto or On)and the other is for Heat, Cool and Off. Make sure the Fan switch is in the Auto position and the other switch is in either the Cool or Off mode. If you continue to get cooling, you have a short in the thermostat wire or a stuck relay in th indoor or outdoor unit. To test this, while the unit is running; remove the round outer ring on the thermostat by pulling it straight off towards you. You will find 3 slotted head screws that hold the thermostat to the sub-base. These screws are located at the 3 o'clock, 7 o'clock and 9 o'clock positions. Turn these screws counterclockwise with a small head screwdriver. They are held in place so should not fall and get lost. With the front of the thermostat removed from the base, the air conditioner should stop running. If the unit continues to run, you will need to have your A/C system inspected by a technician. If in fact your thermostat is digital, look to see how it is mounted to its sub-base and remove it. If the system stops, you may have a bad thermostat or the Fan switch is in the On position. Hopefully this will help.
SOURCE: rewire an old 2 wire thermostat to a honeywell 5-1-1 programmable
I connected the blue wire to the R and the white wire to the W on the old thermostat and shoved the new Honeywell 5-1-1 Day programmable thermostat up the first guys *** that i ran into at Canadian Tire
Thanks for your help
SOURCE: Replacing Round Honewell Mercury Thermostat
try to get one that is made for oil heat, the installation is easy only two wires, and the instructions make it easy.
SOURCE: need wiring for honeywell pro 3000 in trane xe1200
the pro 300 is a single stage thermostat and can not be wired to control 2 heat stages seperately
SOURCE: Honeywell Thermostat power light
I just had this happen to me a few days ago. I hope you find this response before you did what I did and paid an AC guy $103 for him to do about 5 minutes worth of work. Here goes.
The power is shutting off because your drip line is clogged. Your drip line is the tubing that goes from your compressor (inside) to the outside of your house. When that tube gets clogged up (with algae and dirt) then the water will backup in the line. There is a protection circuit in the line and when it detects water (because of a backup) then it shuts all power to the AC off. If you take a shop vac outside and **** all the **** out then you'll be fine. The AC guy said that when I replace my filter every month that I need to pour about 1/2 cup of bleach in the line (from the inside) to prevent algae from forming and stopping the pipe up. Hope this helps someone out there before it costs them a $100.
Hi,
Here is a tip that explains the wiring and the color designations...
Thermostat Wiring and Terminal Designations
Thermostat Problems - How to Change the Thermostat for Heating or Cooling
heatman101
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Hi Righter Shiner, I want to help you with your question, but I need more information from you. Can you please add details in the comment box? IT would be easier to know what you are wiring the Honeywell to, rather than convert the existing wires because dometic makes a lot of thermostats so I need model numbers on both thermostats and the HVAC unit
Dometic 5054 to Honeywell RTH2300/RTH221
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