We are finding a large number of failed secondary heat exchangers in these particular models, which relate to a failure of a polypropylene coating. The secondary heat exchanger is designed to extract the maximum remaining heat from the fuel source, resulting in a normal condensation reaction. The chamber becomes corroded from the inside, possibly due to a reaction from acidic condensation on the polypropylene coating. Carrier has not yet explained the cause of the failure; however, the result is a slow blockage of the system, leading to heat retention and further damage of system components. When left untreated, the furnace will no longer operate and in some situations result in melting of exhaust pipes and a serious risk of carbon monoxide leakage.
Carrier is pleased to announce the Gas Furnace Trade-In Allowance Program. The program offers consumers an alternative to replacing a cracked secondary heat exchanger with significant allowances on select Carrier model furnaces.
Carrier Gas Furnace Model 58pav090 14 Parts Manual Pdf
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