Ask Experts Questions for FREE Help !
Ask
    hfluharty's Avatar
    hfluharty Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Feb 8, 2007, 05:26 PM
    Changing Thermostat
    My husband and I changed our thermostat tonight. We bought a Honeywell T87F 2873 Heating-Cooling Low Voltage Thermostat, when we took the plate off the old one it had 4 wires instead of the two wire set up. We connected the 2 black to each other, and the 2 white then put it back together. The furnace would not shut off. I had to throw the switch to turn it off and my house has a "hot" odor to it. He had to leave for a meeting and isn't expected back for a while. Was hoping to have some ideas by the time he gets home. Googled my problem and found this site. Can anyone help?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Feb 8, 2007, 06:09 PM
    You have bought the incorrect stat. Go back to the store and buy a 4 wire that controls heating and cooling.
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
    Uber Member
    		  
    #3

    Feb 8, 2007, 08:03 PM
    That thermostat may or may not work for you. In order to figure it out, you will need to identify what the 4 wires are doing. For us to help here, you will have to give more details on your system.

    You might also go through the sticky at the top of the heating forum. It has some excellent material prepared by a highly experienced pro. I don't claim to have wide experience in HVAC, and leave most of the questions for Northern Heat.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

NO HEAT! Janitrol heat pump and AC system. Changing to Lux Thermostat. Wiring issue. [ 11 Answers ]

I have a Janitrol A/C and heat pump system. I replaced the thermostat with a Lux T9000LC The A/C works fine, but the heater does not. I have it wired as follows: G - Green Y - Yellow W - White RH - Pink B -

Changing thermostat [ 1 Answers ]

I have a electronic thermostat and have terminations r,c,w,y,o,b,g, and my central air unit has four wires one is blue,green,white,red where would these go on the new thermostat:confused:

Changing thermostat [ 1 Answers ]

I have a electronic thermostat and have terminations r,c,w,y,o,b,g, and my central air unit has four wires one is blue,green,white,red where would these go on the new thermostat:confused:

Changing Thermostat Analog to Digital have 110 volt wires [ 2 Answers ]

I have a baseboard hot water system with a gas boiler. Boiler is 6-7 years old. It has three zones with 3 separate pumps and thermostats. I checked the thermostat wires and they are 110 volts. Folks at the local hardware store I talked to were surprised with the 110 volts but suggested I could...

Changing Heat pump Thermostat. [ 2 Answers ]

Currently have a Honeywell T841A1712 Multi-Stage Heat pump thermostat. I am changing to a Honeywell RTH7500D. All is good except that the manual states "If the old thermostat had wires on W1, Y1, and W2, some modification is required. Call your loca heating and cooling contractor for...

View more questions Search