Technical directory · Combustion
Condensing furnace trap
A condensing furnace produces water from exhaust and uses a trap and drain path separate from the air-conditioner pan.
What to observe
Identify the furnace drain, trap and water route from the exact installation.
A field example
A winter puddle at a high-efficiency furnace may come from its condensate path. The trap has an operating role in the vent system, so cleaning and reassembly need the exact manufacturer's procedure.
What the written work should say
Service should address blockage, leaks and proper trap reassembly and drainage per the manufacturer.
Where this task stops
An improperly reassembled trap can affect venting; do not equate this with household sink cleaning.