LED flashes code 32; furnace may run blower unexpectedly or fail to start a heat cycle.

Safety: Turn off power and gas before servicing. Do not bypass pressure switches.

Steps:

• Check intake and exhaust (2-pipe systems): Ensure both intake and exhaust PVC pipes are clear and properly terminated. Remove any screens clogged with debris.
• Inspect pressure switch rating: Verify the part number on the pressure switch matches the Comfortmaker model's specifications. An incorrect switch can cause nuisance faults.
• Clean pressure ports: Remove tubing and gently clean the ports on the inducer or collector box with a small drill bit or wire.
• Check condensate routing: Confirm that condensate hoses are not sagging or partially filled with water near the pressure switch port.

When to call a technician: If the code persists after cleaning and inspection, a technician should measure actual draft pressures and replace the pressure switch or correct venting issues.