There is a known issue with these furnaces and that particular leaking. You more than likely have a failed "cold header" (or at the very least a failed inducer transition) which is allowing exhaust condensation to leak out. Look at the screws around the unit, are any of them corroded/rusty? They shouldn't be. The leaking water will strip and rust galvanized steel pretty quickly. Eventually that water will short out your circuit board and you'll have more issues.
You 100% need a technician to come and examine this. Insist on someone familiar with these units. If the "cold header" is failed, at the minimum you'd be looking at a new heat exchanger as this part is not field replaceable. A trained Trane tech will have the service bulletin from Trane about this and be able to properly test it for you. DO NOT ATTEMPT TO REPAIR THIS YOURSELF. Simply adding some silicone won't help - the leaking will continue to get worse.
This picture is FYI - more than likely this is what's going on behind the exhaust motor:
"We always fix it right the second time".
All posts are strictly my opinions and not those of my employer. I cannot make statements on behalf of my employer.
All advice posted by me is for educational purposes only, HVAC repairs should only be conducted by trained & qualified people.
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Originally Posted by handeett
Hello,
