Commercial Service Fee Error code for open pressure switch. Resolved by removing two birds and a nest from the exhaust and inducer assembly. Condensate pump is cracked and should be replaced and the TXV needs Re-insulated. Customers gas provider is being contacted about the gas pressure dropping out, but after that is corrected, both systems should have a maintenance done to set the correct gas pressures. The inside of the heat exchanger is black with soot. This is a indication of a bad gas to oxygen ratio which is directly linking to gas pressure, if this is not adjusted in before use each year it will have a big impact on the life of the system as that build up of residue is acidic and will eat through the heat exchanger. Technician Christopher Dehnart Please include your tax exempt number when you call or mail in payment.
