Panasonic · Air Conditioner

Panasonic Air Conditioner H35 error code

Difficulty: Hard · Cost: $80–$200 · Duration: Requires professional service

The H35 error means your Panasonic air conditioner detected an abnormal reverse flow of water or condensate between the indoor and outdoor units. This can be caused by incorrect drain pipe installation where gravity is working against the drainage direction. A qualified technician will need to inspect the installation and correct the drainage configuration.

Common causes

Drain pipe is installed incorrectly causing water to flow in the wrong direction
Drain hose height or routing does not allow gravity drainage
Condensate pump fault causing reverse flow

How to fix it

1

Turn off the unit and contact a qualified technician
2

Ask them to inspect and correct the drain pipe installation to ensure proper drainage direction