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Here is the sisu. Here is the situation: Trane XR90 gas
Here is the situation: Trane XR90 gas furnace installed in 2010. Had trouble with it shutting off intermittently when it was running resulting in the three blinking lights. If we pulled the pvc intake tube out of its socket on the furnace once this happened, the unit would work without trouble. Called technician in after a year or so of this and tech spent several visits investigating the furnace. his solution was to cut the intake pipe off about 1 foot from the furnace so intake came from air in the basement; not outside. this has worked without trouble for several seasons. // We are now remodeling the basement and need to get the furnace pulling fresh air from outside instead of air from inside the basement to satisfy building permit inspectors. My contractor thinks the original trouble was that the intake piping had 4 90 degree turns in it making intake air intake problematic. I have the chance now to re-do the intake pipe on a different route to outside with just 2 45 degree angles. Would t his be a good solution that would have a good chance of fixing the issue? I assume thats since the tech spent so much time investigating the unit and the situation (and that his solution worked) that there are no internal issues with the unit causing the shut down. Thanks in advance for your reply. … read more
Phil
Phil
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Degree, Mech Engr Technology
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Meet the Experts:

Phil

Phil

Mechanical Engineer

7,634 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

HVAC Technician

3,133 satisfied customers

35 years experience, HVAC

Matthew

Matthew

HVAC Technician

2,014 satisfied customers

14 years experience in the HVAC field of service, installation, Manual J & D calculations

Brian HVAC Guy

Brian HVAC Guy

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1,024 satisfied customers

I have been an HVAC/R mechanic/technician for 30+ years.

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Rick Ridley

Rick Ridley

UK Heating Engineer

871 satisfied customers

Retired But have had 30 years on the tools, Ex CORGI

Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

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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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