new furnace problem - http://www.hvacmechanic.com/ Forums
Original message
| buckeye fan
 |  "new furnace problem"
, posted Wed 12 Dec 20:58  
just installed new goodman gmh8 furnace...at start-up burner was on about 2-3 minutes then shut down...main blower was still running for about a minute when the burner began to cycle again...the l e d code light remained solid. any ideas?
go bucks
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Replies:
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| buckeye fan
| "Re(1):new furnace problem" , posted Wed 12 Dec 21:17
solid light is "normal operation"...i ain't buyin it though
go bucks
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| acefurnacefxr
| "Re(1):new furnace problem" , posted Wed 12 Dec 21:13
Can you look at the ledgend on the back side of the blower panel and tell us what a solid red light means?
HVAC REPAIR IS NOT A DIY WEEKEND PRODJECT
I have been performing HVAC repairs for 23 years
http://www.hillaryclinton.com
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| | acefurnacefxr
| "Re(2):new furnace problem" , posted Wed 12 Dec 21:21
Is it cycling normal now?
HVAC REPAIR IS NOT A DIY WEEKEND PRODJECT
I have been performing HVAC repairs for 23 years
http://www.hillaryclinton.com
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| | buckeye fan
| "Re(3):new furnace problem" , posted Wed 12 Dec 21:22
no...this is what it has done since installed.
go bucks
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| | learner
| "Re(4):new furnace problem" , posted Wed 12 Dec 22:03
Hi,
Did you install it? Or call the guy who installed it and let him
take care of it. No testing done after installation?
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| | buckeye fan
| "Re(5):new furnace problem" , posted Wed 12 Dec 22:12
i installed it
go bucks
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| | smythers1968
| "Re(6):new furnace problem" , posted Wed 12 Dec 22:14
Did you set for temp rise - Delta T
Is the fan set correctly for either an upflow or down flow system?
Did you check and adjust gas pressure?
Is the system properly sized for the CFM of your duct work?
Life lesson #12 Know when not to do it yourself.
WOW That Can Hurt!!
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| | buckeye fan
| "Re(7):new furnace problem" , posted Wed 12 Dec 22:19
i set the anticipator at .7 amps/ it is an upflow furnace/ and sized by local company
go bucks
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| | smythers1968
| "Re(8):new furnace problem" , posted Wed 12 Dec 22:21
I'm betting that you have too much temp rise causing the high limit to trip.
HVAC IS NOT A DIY PROJECT
Life lesson #12 Know when not to do it yourself.
WOW That Can Hurt!!
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| | buckeye fan
| "Re(9):new furnace problem" , posted Wed 12 Dec 22:23
thanks for your insight i will have it checked in am
go bucks
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| | smythers1968
| "Re(10):new furnace problem" , posted Wed 12 Dec 22:27
Did you use flex gas line to hook up gas to the furnace?
Life lesson #12 Know when not to do it yourself.
WOW That Can Hurt!!
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| | buckeye fan
| "Re(2):Re(10):new furnace problem" , posted Wed 12 Dec 22:30
it's hard plumbed in
go bucks
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| | smythers1968
| "Re(3):Re(10):new furnace problem" , posted Wed 12 Dec 22:31
Do you have a thermometer
Life lesson #12 Know when not to do it yourself.
WOW That Can Hurt!!
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| | buckeye fan
| "Re(4):Re(10):new furnace problem" , posted Wed 12 Dec 22:37
yes...do you want me to check supply and return air temps or just supply air to see if it'scycling on the high limit stat
go bucks
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| | smythers1968
| "Re(5):Re(10):new furnace problem" , posted Wed 12 Dec 22:42
Yes lets measure supply and return about 4 ft before the furnace on return and 4 ft after the furnace on the supply.
Also watch the temp on the supply when the burners go out and come back on and the blower is running
Ill keep watching so post temps
Life lesson #12 Know when not to do it yourself.
WOW That Can Hurt!!
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| | buckeye fan
| "Re(6):Re(10):new furnace problem" , posted Wed 12 Dec 23:13
i'm sorry for the delay in reply...this unit is in my rental home. i will check that in the morning and if it's cycling on the limit stat, i may have to raise blower speed to correct the problem? thanks again for your help
go bucks
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| | smythers1968
| "Re(7):Re(10):new furnace problem" , posted Wed 12 Dec 23:15
Sounds fine. Im really interested in the results please post them.
Life lesson #12 Know when not to do it yourself.
WOW That Can Hurt!!
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| | acefurnacefxr
| "Re(4):new furnace problem" , posted Wed 12 Dec 21:27
I would have to be there with my VOM in my hand when it acts up to tell you any more.....want a service call from toledo? Its new why dont you call back the company that installed it?
HVAC REPAIR IS NOT A DIY WEEKEND PRODJECT
I have been performing HVAC repairs for 23 years
http://www.hillaryclinton.com
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| | billd40
| "Re(5):new furnace problem" , posted Thu 13 Dec 16:09
I had a similar problem and my vent line was trapping water. Curious to see what you find. Might check all drain lines and make sure the plugs were remove at bottom of burner drain pan letting it get to trap. Have heard of line being installed without removal of plugs. Causes similat problem. GOOD LUCK
Bill Davis
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| | acefurnacefxr
| "Re(6):new furnace problem" , posted Thu 13 Dec 16:11
this is not a condensing furnace
HVAC REPAIR IS NOT A DIY WEEKEND PRODJECT
I have been performing HVAC repairs for 23 years
http://www.hillaryclinton.com
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