Trane Gas Furnaces: TUH1/TDH1 Re: Furnace Lockout Codes / Diagnostic Codes INTEGRATED FURNACE CONTROL - ERROR CODES Flashing Slow Normal - No call for heat Flashing Fast Normal - Call for heat On Replace Control Off Check Power 2 Flashes Lockout...

Trane Gas Furnace: TUH/TDH Re: No Heat - Code 2 Code 2 = 3 Failed Ignition Attempts Qty Possible Causes: 1 Bad Glow Plug Dirty Flame Sensor Clogged Burners No or Low Gas Pressure Bad Gas Valve Bad Ignition Control ...

Trane Gas Furnace: TUH1/TDH1 Re: Flashing Code 3 Code 3 = Pressure switch fault This furnace uses a dual-hose (differential pressure) pressure switch. You need to monitor both hoses at the same time to see actual working pressure. A Code 3 will result from either of the following conditions: ...

Gas Furnace: TUH1/TDH1 Re: Furnace Operating Noarmally The customer claims that there is a heating problem, but you find the furnace running normally. CHECKOUT: 1. Fault Recall Disable all thermostat inputs. Press the "Fault Recall" button for 2-3 seconds to check for any stored...