HVAC

Ask a HVAC Question, Get an Answer ASAP!

Have your own HVAC question?

5 HVAC Technicians are Online Now

characters left:

Not a HVAC Question?

Question

I have a Frigidaire furnance (Model FG6RA120C-16). Everytime it goes to fire up, I see the ignitor light up and then when it's time to light the gas it doesnt do anything and then the red light flashes two times meaning pressure switch stuck open. Well two days ago I replaced the pressure switch cause it was doing what I described above. I've cleaned the airbox, flame sensor and also checked for blockage in the vent. I've even hooked the two wires on the pressure switch to a toggle switch to manipulate the circuit board to think the pressure switch was open and closed when it was supposed to be. Still no flame. Now I'm thinking either gas valve, ignitor, or thermostat. Whats your thoughts?

Submitted: 236 days and 22 hours ago.

Category: HVAC

Value: $15

Status: AWAITING CUSTOMER ACTION

Posted by Billy 236 days and 22 hours ago.

Info Request

Hello,

My opinion is the gas valve, but do you have a meter you could check something with?

Billy

236 days and 19 hours ago.

Reply

yes I have a fluke meter.

Answer

http://www.nordyne.com/Literature/7103590.pdf

I am attaching the wiring diagram here-

You should have a brown and yellow wire going to the gas valve, they come from pin 2 & 4 on a molex plug off the circuit board.

When the ignitor glows for aprox 25-30 secs you should get 24 volts between the brown and yellow wire on the gas valve. If you do not, it is a bad circuit board.

Billy

Accepts:
Expert:	Billy
Pos. Feedback:	99.7 %
Answered:	4/2/2009

HVAC Mechanic

State Licensed Mechanical Contractor, Heating, Cooling, Oil Burners, Heat Pumps, Boilers, Geothermal

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.