Have HVAC Questions? Ask an HVAC Expert for Answers
I am about to leave office tonight but it sounds like we have one of three problems.
1.Board is not sending voltage to gas valve.
2. No gas supply to valve
3. Gas valve is defective and not opening
First step when it does not work is to check for 24v at valve as ahown below when igniter lights.
If we get 24v but no gas we have either a pressure problem or bad valve.If not a failing control board
If we are getting 24v and you are confident you have good pressure to valve or have a manometer or pressure gauge to verify, replace valve.
I have to leave tonight but will be back in the morning.Would you like to check these things right quick before I leave? Or can we continue tomorrow?
Make sure the conctions are clean and secure.,If it gets 24v everytime the solenoid is sticking in gas valve.If not issue will be a failing board. Often when board starts going bad it will be sporatic.I am leaving for the evening but will check in with you in the morning. If i
Good morning Rick.AS for checking to see which is the issue.You have done this.
" Each time the glow plug kicks in the volts jump from 14v to 26v "
That tells us board is doing its job.
Valve is the culprit that is not responding every time.
I do not have the part number but there should be a label on valve like a 36C03-300 or similar.
EF32CW200A looks like a good number
Yes Rick you will replace the whole gas valve .They are not considered field repairable.It will come complete as pictured at link I sent.
No problem.as long as question does not time out we are good.If you are happy to this point, you can rate now and that keeps from timing out.You still have 30 days to follow up after rating at no cost.
Personally I have never been a fan of the Teflon tape although many like it because of the no mess use.I prefer rector seal pipe dope.