Ask Experts Questions for FREE Help !
Ask
    tolitslito63's Avatar
    tolitslito63 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Oct 27, 2007, 06:25 AM
    Heating problems (RTH230B)
    I replaced my old thermostat (mercury type) with the RTH230B. I did not have any problems with the cooling system this summer and seems to be working. Then a couple of days ago I switched to heating. I noticed that when desired temperature is attained, the furnace will turn off (which is normal) then after a few seconds, the fan will turn on again (furnace off) then will turn off after a minute.

    Did I do the wiring correctly? I connected the black wire to Rh, red to Rc, white to W, Y to yellow and green to G.

    Can someone please help me sovle the problem>

    Thank you.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Oct 27, 2007, 07:52 AM
    Sounds to me like your fan/blower controller needs to be adjusted. You are having a ghost blower problem. The control is out of adjustment and it is allowing the furnace blower to come back on to remove a small amount of residual heat.

    You might check with the thermostat manufacturer. Some have a built in program to turn the blower on after a few minutes to reclaim that heat. If it is the thermostat you can usually program that feature out of it. Read your instruction that came with your thermostat.
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!

Heating/ thermostat problems [ 2 Answers ]

I don't know much about HVAC because I haven't had many problems till now. My thermostat (honeywell T8001C) display goes blank and the heat will not turn on. I've tried flipping the breakers in the garage. That won't work. Any ideas?

Heating/ac unit problems [ 1 Answers ]

During the winter, I noticed a burning smell coming from my vents when the heat was on. I turned heat off and I contacted the HVAC repairman. When he turned heat on, we could not duplicate burning smell. He check things out--found nothing and suggested replacing filters. Replaced filters and...

Heating & Air Condition (Honeywell RTH230B) [ 9 Answers ]

Can someone tell me how to install a Honeywell thermostat to a Janitrol unit?. confused I see a total of 7 wires(blk,red,yellow,green,what,brwn,orang)... Where do I start?:confused:

Heating and air conditioner problems [ 3 Answers ]

I have a digital thermostat and the fan will blow out air whether it is in off position or auto. It will run a long time and shut off occasionally but come back on. I have even turned the main switch off at breaker panel and it still runs?? It blows cool air. I have just changed the filter. ...

View more questions Search