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I just changed the flow switch on a laars endurance and now

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it won't fire up.. getting...
I just changed the flow switch on a laars endurance and now it won't fire up.. getting an f3 code. Any help?
Submitted: 1 year ago.Category: HVAC
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Answered in 31 minutes by:
11/14/2016
HVAC Technician: WCohn, Construction Worker replied 1 year ago
WCohn
WCohn, Construction Worker
Category: HVAC
Satisfied Customers: 1,347
Experience: Been in contruction 18+years
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Hello, my name is ***** ***** I look forward to helping you!

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HVAC Technician: WCohn, Construction Worker replied 1 year ago

F3 code indicates a gas valve on without a call for heat.

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Customer reply replied 1 year ago
I saw that, I opened the hot water at the sink and turned up the thermostat.... still nothing
HVAC Technician: WCohn, Construction Worker replied 1 year ago

Test your relay for an open circuit

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Customer reply replied 1 year ago
any other ideas? i bleed all the baseboard heaters.. pressure is up to 12 psi.. no Green led is coming on. I also replaced control board.
HVAC Technician: WCohn, Construction Worker replied 1 year ago

I think you have wiring issues. That's what the troubleshooting flow chart is saying. Do you have a multi-meter?

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Customer reply replied 1 year ago
i do
HVAC Technician: WCohn, Construction Worker replied 1 year ago

I can not find a wiring diagram and I need to leave, but I'd check for loose connections and an open circuit at the relay. Especially anything plugging into the circuit board you replaced. Sorry I can't help you further, but I'd still appreciate a positive rating for what I was able to do.

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WCohn
WCohn
WCohn, Construction Worker
Category: HVAC
Satisfied Customers: 1,347
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Experience: Been in contruction 18+years

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