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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have an error code of 003 on my Weil McLain ultra model

Customer Question

I have an error code of 003 on my Weil McLain ultra model #pclvd14n100a. Serial #476269
JA: How old is the appliance? Have you gotten error messages before?
Customer: 7yrs old. I've had other error codes, got the correct parts to clear these
JA: Do you plan on doing the work yourself?
Customer: Yes
JA: Anything else we should know to help you best?
Customer: No
Submitted: 11 months ago.
Category: HVAC
Expert:  Rick replied 11 months ago.

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. First I’ll need some more info so I have a more complete picture of you situation.

Does error occur before ignition tries or after 5 ignition tries/atempts?

Customer: replied 11 months ago.
Expert:  Rick replied 11 months ago.

Could be a bad connection to the gas valve. Also check the resistance across the outer 2 pins on the gas valve. Should be ~50 ohms. Resistance across each pin to ground should show an open circuit

Expert:  Rick replied 11 months ago.

If readings are not in this range then replace the gas valve. If they are OK then you probably have a bad control module.