weil mclain QB-180

Old 07-07-07, 04:12 PM
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weil mclain QB-180

I'm having trouble with a weil mclain QB-180 It has fire temporarily but it won't stay lit. I have checked for a dirty cad cell, obstruction of cad cell and loss of prime. How can I check the to see if the cad cell and primary control are functioning properly? Can I find these parts locally?
Old 07-07-07, 07:03 PM
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Qb 180

These burners can be touchy. Make sure you have the factory specified nozzle installed & the cam is set to the proper position for the nozzle. Often burner lockout if caused by the flame being too lean (too much air). You can check the cad cell with an ohm meter if you have one. The ohm reading should be between 400 & 1200 ohms while the flame is burning.
Old 08-14-07, 07:02 PM
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qb 180

i have that plbm all the time the wires from the transformer are blocking the eye you have to be careful how you place the wires trial and error

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