Tech Tip: F09 Error Causes

Many people often inquire about an F09 Error. Common causes of F09 Errors include: No spark Clean rectification probe Check venting for restrictions or obstructions Condensate backup ...
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Adjusting Manifold Pressure

I speak with a lot of contractors who have made the catastrophic mistake of tampering with the offset screw of the gas valve to adjust the system’s combustion. Many mistook this for the throttle...
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