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Some real incompetent techs there. Oil burners are hammer-simple. I forget exactly b/c it’s been a few years since I had to dig into my one, but you either jump low voltage T1-T2 to simulate the thermostat asking for heat, or jump line voltage to L1-L2 to bypass it all and fire the gun. If those tests fire the gun, the problem is upstream (the control, a zone valve, or a thermostat . If they don’t work, the issue is in the gun… but an entirely new oil burner assembly / gun is only about $600.
I’d have a real issue with that bill.
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Ken
1986 930 2016 R1200RS
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