Ask Experts Questions for FREE Help !
Ask
    gba's Avatar
    gba Posts: 7, Reputation: 1
    New Member
    		  
    #1

    Dec 5, 2007, 09:02 AM
    Heat not working on auto
    I installed a new thermostat because I believed the last one didn't work. The new tstat is a Honeywell model RTH221. My furnace is a Goodman model # GMPN080-4. when I put the tstat to "on" the heat comes on sporadically. However it gets cold w/ the fan constantly running. On "auto" the heat doesn't come on regularly at all. The tstat was set to "auto" last night at 78 degrees, I woke up this morning and it was 60 degrees. Any suggestions? When the heat is on, the furnace never reaches the target temp. I did set the new tstat to setting of 3:5 (12min (gas or oil)) setting
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 6, 2007, 09:15 AM
    You probably wired the thermostat wrong. You really should trace the wires from the thermostat to the furnace and see where they hook up so you can determine what color goes where. Sometimes the wire color code is not followed and if that is your case it could also be your problem.

    Your wiring diagram for the tstat is below.

    http://customer.honeywell.com/techli...69-2060EFS.pdf
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #3

    Dec 6, 2007, 10:43 AM
    Take a look at what Northern Heat has left for us on this subject. https://www.askmehelpdesk.com/heatin...ons-58313.html
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!

Fan Blower not working in "ON" or "AUTO" in heat or AC [ 13 Answers ]

Got home from the Brewer game this afternoon and noticed the house was warm(78). Outside was 91. I checked the T-stat and it was set correct. Noticed the air vents weren't blowing anything. Went outside and the condenser and fan was running fine. Then I went downstairs to the furnace unit to see...

Heat does not come on on auto [ 1 Answers ]

My ac has work good all summer and now my heat did not come on when I turned it on auto it works only on fan. Could the problem be a contactor?

A/C working, switched to heat, now ac and heat don't work [ 1 Answers ]

Hello, Replaced my thermostat in the summer, everything worked good,switched the new thermostat to heat for the first time, now neither the A/C or heat work? Any Ideas? Andy

Heat runs with ac and even auto kicks on emg heat [ 1 Answers ]

(Coleman Evcon) Some how the hot and cold on the inside thermostat switched.how is that possible?and how do I fix it?

Furnace won't heat in Auto [ 2 Answers ]

I have read the different posting and replys, but they don't seem to address my problem. Friend has an older Kenmore Power Miser 70 that has an old electronic ign. (no flame senser). The furnace will heat when the fan switch is set to "on" position, and it will cycle the heat. When the fan is...

View more questions Search