Question about Lite On Laars Lite 2 Heaters: 250,000BTU MV Heater

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Heater won't light. Pilot on and good flow.

Suspect pilot generator is the problem. Is there a way to confirm with a voltmeter? If so, what are the contact points? Where is it and is it simple or difficult to replace?

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Depending on how old the unit is it may have a thermopile "generator". the thermopile will have 2 wire leads that usualy attach to the main gas valve by 2 screws. set your multimeter to mvdc and tke a reading usualy anything over 350 mvdc will be able to energize the gas valve. any bad connections or open limits or safty switches will not alow the main gas valve to energize. hope this helps.

Posted on Jun 15, 2009

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