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Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 21554
Experience:  40+ yrs. experience as a licensed oil & gas technician.
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Older Burnham gas boiler for hot water heat system, the VIZ

Resolved Question:

Older Burnham gas boiler for hot water heat system, the VIZ logic card, runs through all the led indicators, Pilot lights, however, the main gas valve relay does not light, and after 10 seconds the pilot goes out, without the boiler lighting.
Submitted: 7 years ago.
Category: HVAC
Expert:  Rick replied 7 years ago.

You probably have a faulty pilot flame sensor or a fault in the pilot proving circuit. About the only thing you might try before calling in a tech is to check the electrical connections to the pilot electrode and carefully clean off any carbon that has built up on the electrode.
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