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

    Nov 27, 2012, 12:11 PM
    HVAC Heat blower won't turn on in auto
    I have a 1984 Rheem gas furnace model # RGDA-100E-GR with a 11-7DU blower. The blower won't engage in auto mode in the heat setting, but it will engage in the "On" mode. It will engage in both modes in the a/c setting.

    I've replaced the fan relay on the assumption it had failed. No difference. All wiring is intact, nothing is crossed, the system hasn't been worked on at all in recent times. The system worked fine until the other night when this symptom popped up. Any ideas?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Nov 27, 2012, 02:43 PM
    Look for BFC (Blower Fan Control) on these diagrams.


    https://www.rheemote.net/docstore/we...0-21283-10.pdf

    https://www.rheemote.net/docstore/we...2748-02-01.pdf

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!

HVAC Blower works in Auto, but not in the ON position [ 3 Answers ]

I have a Lennox 80MGF3/4-100A-1 furnace. According to the stickers it was converted to a heatcraft ignition control board EGC-1 at some point. I just moved into the house and noticed that I can not kick on the blower manually. The Heat and A/C both work fine and it kicks on automatically when...

Blower not working when heat (thermostat) is set, but blower comes on when on Auto. [ 2 Answers ]

When I set the thermostat for the heat the blower does not come on. When I turn the fan on Auto the blower comes on. What's my problem?

HVAC blower will not turn off on my American Standard [ 1 Answers ]

I have a 2 year old 4 ton American Standard HVAC unit and the blower fan will not turn off no matter what I do. This problem happened at the same time last year and the tech cam out and replaced my thermostat and all was fine. I have troubleshooted the thermostat and this is not the problem. I have...

Hvac blower heats temporarly then have turn power off then on to reset [ 0 Answers ]

My gas heater heats and blows the hot air temporarly. Then stops heating and blows cool air. I have to turn the power off and then back on to reset it to heat again.

HVAC blower motor will not turn off [ 6 Answers ]

Carrier Model 58ES080-30 HVAC blower motor will not turn off. Help?


View more questions Search