THE FURNACES WERE IMPROPERLY INSTALLED. A 1 1/4" MINIMUM OVERLAP BETWEEN THE CHAMBER EXHAUST TUBE AND THE VENT ASSEMBLY EXHAUST IS NEEDED FOR PROPER EXHAUST.
RiskTHIS CONDITION CAN LEAD TO CARBON MONOXIDE POISONING.
FixDEALERS WILL REPLACE THE FURNACE VENT ASSEMBLY.