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We spoke earlier but had to leave because I was on my work…

Customer Question
Pearl, we spoke earlier...

Pearl, we spoke earlier but had to leave because I was on my work computer, about a problem I was having with my single stage PSC gas furnace. It is brand new, professionally installed on 10/17/17. It keeps the house warm but continually gives me the 7 blink error code for low gas pressure. My gas company was in yesterday and put in a new gas meter, sniffed all the lines in the house for leaks, did a pressure check right where the gas goes into the furnace and it was adequate. The filter is brand new. It consistently goes into a fan mode and blows cool air into the house.

Contractor's Assistant: Did you double-check the thermostat's settings? And what about the filters?

Stat settings are ok...on heat and on Automatic. It is a simple stat, not a programmable on, it also is brand new.

Contractor's Assistant: Do you plan on doing the work yourself?

Yes, if it's simple enough to fix.

Contractor's Assistant: Anything else we should know to help you best?

No, I think I covered it.

Submitted: 8 months ago.Category: HVAC
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Answered in 1 hour by:
12/30/2017
HVAC Technician: Phil, Mechanical Engineer replied 8 months ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 9,880
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello, these sorts of situations are caused by a bad printed circuit board in 95% of the cases....

.

You can do a heat stress test on the board, use a hair drier to warm the board up to 130F, slowly and gently, then try the furnace again and if *anything changes, for the better or worse, the board is bad for sure...it has microscopic cracks in it. No change however does not prove the board is good.

Let me know how that goes.

.

My goal is to give you the best experience possible! I hope I have earned a 5 star rating! Please remember to rate my service by selecting the 5 stars at the top of the screen before you leave today. If you need more assistance, please use the reply box and let me know.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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