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If you are troubleshooting an oil burner that won't fire
This board is a confirmed fit for the FK4BNF003000AAAA air handler series
Does this include the low gas pressure switch
it is frequently used in A
Lennox 38M77 Pressure Switch 318973-401 If you are troubleshooting anThe Lennox 38M77 High Pressure Switch is a critical OEM safety component designed for R 410A HVAC systems. Engineered to monitor discharge line pressure, this switch prevents compressor damage by interrupting the control circuit when pressures exceed safe operating limits. With a factory calibrated trip setting of 640 psi and a reset threshold of 475 psi, it ensures precise high limit protection in commercial and industrial rooftop units and split
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