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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I believe this unit needs a new circuit board...there is a

Customer Question

I believe this unit needs a new circuit board...there is a little red light that is not working...could that be why the unit will not fire up?
JA: Did you double-check the thermostat? And what about the unit's filters?
Customer: Unit will not fire on any of the zones thermostats..Where are the filters located?
JA: Do you plan on doing the work yourself?
Customer: Yes
JA: Anything else we should know to help you best?
Customer: No
Submitted: 10 months ago.
Category: HVAC
Expert:  Rick replied 10 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.

What s the brand and model number of your unit?

Customer: replied 10 months ago.
Raypak boiler model#h3-0135B-cjraba
Expert:  Rick replied 10 months ago.

You should have a pro check this out. It could be a bad board, could also be a bad transformer or other power input problem.