I replaced the blower motor , and now I'm getting "Limit or Flame Roll Out Switch" error 33.
So yes it works, but sometimes it quit with that error and restart immediately.

So if it's 66F now and I set it to 70F. It will go all the way to 69F and then quit with that error and start again and so on...

The blower turns freely , the filter is new. Not sure what's going on here ?

Brand?

Exact model?

Possible heat exchanger problem!

Forgot to mention, I replaced it with the same specification motor : 115V, 1075rpm, 4 speeds.

I pressed the reset switch , I believe it's the roll out switch .
It didn't do anything.
Error 33 in details :
LIMIT OR FLAME ROLL-OUT SWITCH IS OPEN- if open longer then three minutes code changes to #13.Flame roll-out switch requires manual reset.
Check for :Defective blower motor or capacitore.
- Dirty filter or restrected duct system.
-loose blower wheel
-Defective switch or connections.
-Inadequate combustion air supply (flame roll-out switch or fuse link open)
-Open flame Roll-out switch ,or fuse link.Manual reset or replace.

The flame looks fine.
The blower turns fine.
The filter is new.
The switch doesn't seems to effect.
The furnace run fine with the old motor except the fact it died (the motor)

So I doubt its inadequate combustion air or anything in that nature, because I just replaced a motor.

Could be the capacitor is not the right one ? Or bad ?
Is there a test I can do to isolate the problem ?


Thanks Dan

It's say PAYNE on it. Heard its OEM Carrier somewhere.
But why heat exchanger will go bad suddenly , when I replace the motor ?

I notice if it's 60F and I "ask" for lets say 66-67-68 it works fine.
Higher temp seems to couse the temp.

Payne is Braynt and Carrier. Sorry but without the exact model number I cannot look the unit up to see what the problem might be. They have made 2,000+ furnaces in the last 20 years so without the number it is all a guessing game. Even with the exact model number it is still a guessing game just a bit more accurate since we are not there to see all that was done or what the unit is doing besides posting a code.

When you replaced the motor you should have got the exact NEW capacitor for it. You never install a new motor without a new capacitor.

Usually a flame rollout indicates the flue gas is coming out in the vestibule of the unit instead of going out the exhaust. A bad heat exchanger or plugged up heat exchanger or a resteicted heat exchanger can cause this problem. NOTICE I said possible bad heat exchanger since I am not there to see all that is happening.

OK I will look for the exact model. I'm not at home now ,will do this tonight.
It is a new Capacitor. I bought the motor + capacitor in the same place. And trusted the store to give me the correct one.
But hard to tell at this point.

I guess I can try just to run in "fan" mode. And see if it does the same...

Thanks for the help !

OK it's a long number : Payne pg8uaa048091

I tried running just the fan , and didn't get the error.
From few experiments I did, opening all the vents at my house does help. But I tried only once or twice so I'm not 100% sure.
I just noticed when some of them are closed, its happening more often.

Is it possible I hooked the speed wires wrong ? And now it's turning maybe too fast and causing over heat and quits ? Just guessing here

Thanks

My last statement that opening all the vents made it works better, turned to be wrong.
It just did it, quit at 68F while asking for 70F...

It is possible the blower motor is running in reverse or wrong direction since this does happen on a motor replacement from time to time. The blower motor itself is not the problem of the furnace code 33 issue in and of itself.

As you have read the code 33 issue usually is contained in the manufactures list you provided in one of your posts.

Dirty or restricted air filter
Blocked or restricted return air duct or closed registers can all force the furnace to overheat.
A blower running in reverse will also not move enough air as well as a blower wheen installed backwards in the housing.

To little combustion air for the furnace to burn and the list goes on and on.

Sorry but while I have located your model number I have no manual for it and no factory pointers.

The main problem is I cannot see exactly what you have so it is somewhat a educated guessing game from here.

Yes I thought about the fact it turns the wrong way. But will it still blow air through the vents when it turning the wrong direction ? Because it does blow air...

I can take pictures (or video clip) of it or any specific part. Will that be any help ?

Thanks

yes i thought about the fact it turns the wrong way. but will it still blow air through the vents when it turning the wrong direction

It might move some air BUT not enough for the furnace to not have problems. Is it drawing air into the return air duct?

Yes it does draws air into the return duct
I just put a paper near it and it pulled it a bit