Air Conditioner have a Condensate Drain Pan_ One or Two?

The number of drain pans in your unit is determined by the location of the air handler unit. Local code and functionality require the unit to have two condensate drains if the evaporator coil and drain are located in your home’s attic.

The primary drain pan is the first drain pan. This pan is located inside the air handler, beneath the evaporator coil. The auxiliary drain pan is the name given to the secondary pan. This pan, which is located beneath the air handler, serves as a warning to both the homeowner and the professional HVAC technician.

If the auxiliary drain pan is overflowing, it is reasonable to assume that the primary drain is backed up, clogged, or otherwise in need of attention.

When the air handler is installed in the basement, an auxiliary drain pan is not required because the water must be carried by the primary drain line.

Condensate from air washers, air cooling coils, fuel-burning condensing appliances, the overflow from evaporate coolers and similar water supplied equipment, or similar air conditioning equipment shall be collected and discharged to an approved plumbing fixture or disposal area,” states the Uniform Mechanical Code.

If discharged into the drainage system, the equipment must drain through an indirect waste pipe.

Maintain Cleanliness

Algae can accumulate in drain lines and Condensate drain pan. To prevent these living substances from growing in your water route, use vinegar or bleach.