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Furnace pressure switch stuck

  • Last Updated:
  • Dec 20th, 2020 1:14 pm
Deal Addict
Apr 18, 2013
4061 posts

Furnace pressure switch stuck

So my 19 year old Bryant furnace wasn't working again last night. Technician came buy and fixed it. The pressure switch was stuck. He ran a voltmeter on it at the switch was working. He fixed it by blowing a number of times (inhaling and exhaling) through a small tube going into the pressure switch. He explained it like there's a small balloon/diagram inside the switch that got stuck.

Furnace is working great now. Came on and off several times.

My question for you all is how long can I expect the pressure switch to keep working? Is this a few days fix or is it good for a while now?

A new switch will cost me around $300 and if that's the case I might just get a new furnace as my current Bryant is almost 19 years old and it's been costing me money the last year or so with $200-300 repairs and recently $150 per service call.
5 replies
Deal Addict
User avatar
Jul 31, 2007
2051 posts
York Region
I don't know which part of Canada you live in. It is sure no fun to have no heat in the coldest part of the year if your furnace die on you. You say it is 19 year old furnace it is time to get a new one especially it is giving trouble already. That is what I will do.
Jun 22, 2011
74 posts
I agree 19 is past due and you are better to shop around when you are not in an emergency (no heat).

However, I had a Payne furnace that started doing this after about year 12. It progressively got worse and it would happen when it started like 3 times a winter and eventually twice a week. I did some googling and found it was a common problem and there was an improved replacement part which I ordered off EBAY and installed myself. Get the part number off the pressure switch you have now and you will find a slightly different part number that replaces it. Two wires and two hoses and it worked fine. However, during the time it was happening I kept a pencil handy and gave the pressure switch a tap with the pencil, reset the furnace and away it would go until the next time. Would happen periodically and the family would start complaining it was cold, go and check, sure enough flashing lights. I don't remember the replacement pressure switch being expensive but couldn't find the receipt and got 8 more years out of that furnace before the fan went. Replaced it with another Payne model and it has been good ($2800 installed).

Actually, I found the ebay receipt...
Last edited by Dargon on Dec 19th, 2020 10:20 am, edited 1 time in total.
Deal Expert
User avatar
Jun 12, 2007
20141 posts
I thought some Carrier/ Bryant/ Payne furnaces from that time period had problems with secondary heat exchanger failure?
Deal Addict
Dec 14, 2011
1968 posts
$300? Does that include labour? These are simple to replace yourself.
Deal Expert
User avatar
Dec 12, 2009
27711 posts
The contacts have gone bad on the switch. This kind of wear does not self heal. Expect it to fail again any time. The workaround may or may not work a second time.
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