Gas Valves

[pcairetech]

Hey guys need your help, i'm not used to dealing with heat down here in Houston but the calls are coming now. Got an Armstrong furnace, induced fan motor comes on, burners come on, blower takes about 5 mins to come on, as soon as it does the burners shut off. Blower keeps going, burners come back on a few minutes later but go off again. Limit switch is closed

[heaterman]

PC you have enough posts, apply for pro membership and we can help. Gonna get more technical than allowed in the open forums.

[mo-flo]

i wouldn't think that 5 minutes for blower to come on is right...IMO.

[ncar32]

the sequence of operation is correct .. flame roll out is where i would start..is the unit a newer unit? The newer gas furnaces have L.E.D lights that give a code listed on the door panel...

[saylor240]

deff some type of limit, read the scematic im sure there is more than just one.

[Reliable HVAC]

Trippin on high limit ... check flame sensor too ...

[pcairetech]

Thanks guys, I actually found the problem. I applied for pro membership as well.