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HVAC heating problem

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posted on Oct, 10 2016 @ 05:50 PM
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We have a 15 year old Goodman furnace that worked once this morning and then stopped.

We get a call for heat, and then nothing.
The blinking light error message is three blinks, which means a pressure switch issue.

The guy who came out is trying to tell us the switch is not bad....that it is a problem with the rings of the heat exchange.
Based on the switch not closing and the visual inspection on the flame when he bypassed the pressure switch.

I cannot understand how he knows it is not the switch...but the more serious problem.

Help anyone????




posted on Oct, 10 2016 @ 05:53 PM
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a reply to: DontTreadOnMe

Longshot, but check the vacuum hose that's connected to the switch.

Sometimes dirt/rust will restrict the airflow that controls the switch.

If the switch actually works, then the guy might be right.

I have had this happen.

Good Luck !!



posted on Oct, 10 2016 @ 05:56 PM
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a reply to: DontTreadOnMe


Go to youtube and type your description in the least words possible and see if you can't come up with a match! Unless you know and trust the person doing the repair, the more YOU know the less chance of you getting ripped off?

It might take watching a few videos, but it's worth is if you can fix it yourself and save a bunch of money!

I had a refrigerator act up and lo and behold YOUTUBE enabled me to fix it very cheaply versus relying on a "specialist".

Let me know what you find out!


Edit: When doing the search try to be specific to the make and model of your furnace. Usually if it is a common issue, you will find someone on YT who was nice enough to try and help/educate someone else.


edit on 10-10-2016 by seeker1963 because: (no reason given)



posted on Oct, 10 2016 @ 06:03 PM
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We tried doing that tube thing.
We can get the switch to close...but it won't stay closed.



posted on Oct, 10 2016 @ 06:11 PM
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originally posted by: DontTreadOnMe
We tried doing that tube thing.
We can get the switch to close...but it won't stay closed.


Meh, I tried. I hate to be at the mercy of a specialized tech. I feel your pain.......

YT has saved me quite a bit of cash the past few years...
edit on 10-10-2016 by seeker1963 because: (no reason given)

edit on 10-10-2016 by seeker1963 because: (no reason given)



posted on Oct, 10 2016 @ 06:26 PM
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a reply to: DontTreadOnMe

Lift the exhaust stack off- have a helper hold it up, while you vacuum out the rust pile. Put the stack back on. Goodman old systems were similar to the coleman systems, some had a baffle in the exhaust port. If rust is in there, it will not breathe and will stop the cycle from continuing to call for heat. Also, pressure switch is a low pressure diaphragm, carefully suck on the tube and listen for the switch to operate. If you don't want to use your mouth you can buy a hand vacuum pump and gently work the switch. Best of luck.



posted on Oct, 10 2016 @ 06:30 PM
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Not knowing if the switch has a diaphragm in it or not this is just a guess. If it has a diaphragm it's possible that the switch can close but if there is a perforation of the diaphragm, then it can not hold the vacuum and reopens. Also check the hose for a partial crack as this could cause the same problem.



posted on Oct, 10 2016 @ 06:31 PM
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a reply to: DontTreadOnMe

Pressure switch is doing it's job if it's shutting down your furnace due to the heat exchanger, the guy probably told you there's a crack in your heat exchanger and need the unit replaced?

That's no joke since carbon monoxide can enter your house, I do AC we get a lot of those.



posted on Oct, 10 2016 @ 06:32 PM
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a reply to: DontTreadOnMe

Have you tried to jump power over your vac switches? I have the same brand of furnace and last year a vac switch hung up, $30 replacement off ebay.



posted on Oct, 10 2016 @ 06:36 PM
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You might have gremlins. Don't feed them after midnight.

Sorry. I have nothing. I was trying to make you laugh.



posted on Oct, 10 2016 @ 06:51 PM
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Never mind.

Thought it might be the sensor.

edit on 10-10-2016 by Bigburgh because: (no reason given)



posted on Oct, 10 2016 @ 06:54 PM
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originally posted by: seasonal
a reply to: DontTreadOnMe

Have you tried to jump power over your vac switches? I have the same brand of furnace and last year a vac switch hung up, $30 replacement off ebay.



Forgot to add, if what is quoted above doesn't make sense to you, maybe calling a tech is a safer alternative. Of course you tube has TS&R videos, but be careful, it is a $120 service call. Cheap money if you make a mistake and burn a board (or a house).



posted on Oct, 10 2016 @ 07:03 PM
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A little more detail....the heating guy who also put a camera down the heat exchanger...and said he saw a ring on the floor of the exchanger...TBH...I don't know if what i saw was a ring on the floor....or he was just telling me that....the lighting was pretty bad after all.



posted on Oct, 10 2016 @ 07:10 PM
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originally posted by: DontTreadOnMe
A little more detail....the heating guy who also put a camera down the heat exchanger...and said he saw a ring on the floor of the exchanger...TBH...I don't know if what i saw was a ring on the floor....or he was just telling me that....the lighting was pretty bad after all.


The tech is saying the heat ex is bad? If so:



The Goodman warranty is not transferable, unless you are a contractor building and selling a home. The Goodman warranty is only valid with the first homeowner who owns the unit. Which Parts Are Under The Warranty?

The Goodman warranty offers a 5-10 year warranty on all functional parts and a limited lifetime warranty on the heat exchanger. You must register your warranty online within 90 days to get the 10 year warranty, otherwise it becomes a five-year.

topfurnaceguide.com...



posted on Oct, 10 2016 @ 08:25 PM
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Similar issue- mine would fire up but no heat would come out. Pilot light on and all.
Looked it up on youtube, found this little switch that looked like and allen key. Pulled it out and cleaned the gunk off it and badda bing she fired heat when i put the switch back



posted on Oct, 10 2016 @ 08:57 PM
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Actually looking at the flame can tell a lot. It should be a nice blue, even flame, with maybe a bit of orange at the tips. If it's ALL orange, you've got a crack. Do. Not. Bypass. The. Switch. Carbon monoxide will kill you in your sleep or put you to sleep while watching TV and you just think you're getting drowsy. Go through and clean all the parts as others have suggested, but if that fails, you really should get the Pros to handle it.
If nothing else, get a 2nd opinion before you get it replaced.



posted on Oct, 10 2016 @ 09:06 PM
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originally posted by: DontTreadOnMe
A little more detail....the heating guy who also put a camera down the heat exchanger...and said he saw a ring on the floor of the exchanger...TBH...I don't know if what i saw was a ring on the floor....or he was just telling me that....the lighting was pretty bad after all.

Its normal to inspect the surfaces of the heat exchanger for 'burn through' (holes). If there are he should be able to detect Carbon Monoxide coming into the house with a sniffer. They should have one. This doesn;t relate to start and stop issues.

Otherwise, he's playing you about the heat exchanger. When was the last time you changed the filter?

Try looking in here...

Problems with fifteeen year old Goodman furnace.



posted on Oct, 10 2016 @ 10:21 PM
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OK, planning on getting another opinion.
ASAP.

We are looking to get an 80% single-stage furnace...just a basic furnace.
We're looking for an economy model.....

Any suggestions as to which make is best in this type of furnace?
edit on Mon Oct 10 2016 by DontTreadOnMe because: (no reason given)



posted on Oct, 11 2016 @ 06:30 AM
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a reply to: DontTreadOnMe

Carrier, Rheem, Ruud, American Standard,are the ones I have the most experience with and all good, dependable brands.
Whatever you do, don't let them sell you Janitrol!! I never liked Trane because of the wiring. They changed standard colors so you have to have one of their techs to work on it.



posted on Oct, 11 2016 @ 09:52 AM
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a reply to: DontTreadOnMe

Last year I picked up a high efficiency gas furnace from Alpine home air. It was $850(ish) American funds for a 108000btu condensing unit, I converted to LP and installed it myself and saved the huge cost of paying a professional. Very happy with the quality and efficiency and shipping was fast (and cheap considering it was a furnace).

www.alpinehomeair.com... the price has gone up a little but I am very happy with this one.
edit on 11-10-2016 by Awh6669 because: Adding link




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