Question about Teledyne Laars Laars Lite 2 Pool Heater 250,000 Btu / Propane Gas

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Pilot on main burner won't light.

If I bypass all safety's with strap main burner lights. I have bypassed each safety one-by-one but this don't help isolate problem. have changed 750 volt thermopile. I have cleaned pilot orfice. I read 629 milivolts from thermopile disconnected from ckt while holding pilot button down to keep pilot on. I read approx 30 ohms resistance thru the safety ckt in series; 2 hi-limits, pressure switch,fuseable link.

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  • 02wrx Jun 18, 2009

    Returminated all wiring, found to be marginal on-off switch

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30 ohms is too high. You generally need it close to or below 1. You need to read the ohms across each switch to find the connection or switch that is holding up your control voltage from opening the valve. If that still doesn't work, jump the th terminals on the valve and see if the valve even opens. You may need a new valve.

Posted on Jun 17, 2009

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Pressure swith not closing

Posted on Nov 17, 2009

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