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

    Dec 29, 2008, 12:18 PM
    Bouncing Relay on Gas Furnace Controller
    Have a Bryant Plus 80t energy efficient Gas Furnace that is fairly new (@ 2 years) that fires off and heats correctly, but when it reaches temperature on the thermostat, shuts off with the relay clattering as if bouncing on its contacts. Question: Is it dangerous? What relay is it? Is it on the control board and does the whole control board need replacing? Looking at the schematic for the circuit it looks like it might be IHI/LOR or the Inducer motor Relay (SPST), or MGVR-Main Gas Valve Relay (DPST). Comments?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 29, 2008, 03:32 PM
    First of all that unit has a 5 year parts warranty only if the work is performad by a Bryant dealer.
    Many times this is caused by the thermostat and not the furnace. Remove R and W wires at the furnace and use a jumper to connect the two. Then turn on. Wait a few minutes then turn off. If the noise is gone that means the thermostat is causing the problem. If that does not cure the problem call the Bryant dealer that installed the unit or another bryant dealer because the parts can be expensive.
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!

Coleman furnace relay fan [ 4 Answers ]

COLEMAN FURNACE 3100B seiries fan relay " RBM type 184" went bad and was removed from furnace without noting the wiring. Now have new relay but have no idea which color wire goes to which post. Have colored wires and numbers on post. Any help would be appreciated.

Fan relay for coleman electric furnace [ 2 Answers ]

Hello, I was hoping you could help me locate where the fan relay is located on my coleman electric furnace? Serial #069076324 Model#3500A811. I have the problem figure out, I just don't have the knowledge to read the schematics.

Add a fan only relay to my Heil LP furnace [ 3 Answers ]

I am adding an hydronic heat coil to my heil high efficiency furnace. I'm installing a 24volt relay wich I already have. I need to know how to wire this up. The furnace is a 1995 model. My objective is to run the fan on thermostat switch,and keep the LP heat for a back-up. Thanks

Furnace relay switch [ 13 Answers ]

After duct cleaning my furnace (heat and air) does not work anymore. The thermostat indicates the system is on. Furnace light is on but the fan is not turning. There is that switch that you press when you open the door to the furnace. I guess is a relay swtich. On when door is closed and off when...

Faulty Relay in Furnace [ 2 Answers ]

Hi everyone. My Concord two zone oil fired forced hot air furnace decided to stop coming on the other day. It has a Honeywell EMM-3 zone controller, a relay and a transformer. I had my oil dealer come and look at it, it was working for him. After he left, it stopped again. I took matters into my...

View more questions Search