Gas Furnace - Locking Out / Sometimes Doesn't Heat

Gas Furnace

Re: Lockout / Sometimes Doesn't Heat

Customer reports that the furnace sometimes stops working. They can get it to work again by turning the thermostat or power off and back on.


Small Control

Most of these gas furnaces, 80 & 90%, use a White-Rodgers or Robertshaw Hot-Surface Ignition Control.

A diagnostic light on the lower left-hand corner of the board indicates "Lockout" status.

► For Control Replacement, use IGN.02 Universal Hot Surface Ignition Control.


Qty Possible Causes:
2 Dirty Flame Sensor
Pressure Switch Fault
Clogged Burner(s)
Low Gas Pressure
Bad Inducer Motor/Capacitor
Bad Gas Valve
Faulty Control

CHECKOUT:

1. Check Ignition Sequence


2. Check Ignition


3. Check Gas Pressure / Valve


4. Check Flame Sensor




Article ID: 175
Last updated: 20 Mar, 2017
Revision: 19
Equipment -> Gas Furnaces -> Amana -> GCI/GHI/GSI/GUC/GUI -> Gas Furnace - Locking Out / Sometimes Doesn't Heat
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