York Furnance Fan Limit Control

[hvacbartlett]

My 14 years old York Furnace stopped working. If I let fan run all the time, the furnace works fine. However, if I switch the fan mode to auto in thermostatic, the fan will not turn on and eventually the Furnace will shut off due to overheats. I suspect my Fan Limit control is not working properly. How could I test it? What other reasons can this happen?

Thanks

[BobbyBJr]

Without more info such as a model and serial number, we are only guessing. You really need to call your local service company and let them diagnose and quote you a repair. We aren't allowed on this site to give out DIY info. Good luck with it.

Bobby

[dartman]

Age and call a pro

[40_cents]

I see allot of furnaces everyday and it seems that most furnaces start to break down and wear out around this age. I tell my customers that they may want to consider a newer more efficient furnace that has a warranty, Is going to be more dependable, And can even provide better comfort in some cases. For EXAMPLE. I get a call and see a furnace with a bad blower. I will start checking other components and take as much information to the homeowner about their furnace with a bad blower motor. And give them a price for a repair of the blower motor. Usually ends up being a domino effect some times.
Ask yourself:
How long are you going to be in the house?
Do you want to keep throwing money into it?
What could be the next thing to go bad?
When is it going to break down again?
It is your money and your time.

Maybe a annual check up on the furnace may prevent a problem. One thing that can help as a home owner is to change your filters on a regular schedule. Do yourself a favor call a pro in your area where they can discuss your furnace with you. Don't think of a diagnostic fee as a waste of money. This is how you find out what the real problem is and the right way to get the job done.