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TUH1/TDH1 - Diagnostic Codes

Article ID: 470
Last updated: 10 Jan, 2018

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 due to re-tries or recycles
3 Flashes Pressure switch fault (open or closed)
4 Flashes Open limit circuit
5 Flashes Flame sensed with no call for heat
6 Flashes Reversed polarity, low voltage or poor ground
7 Flashes Gas valve circuit error
8 Flashes Low flame signal
9 Flashes Check Ignitor, Possible grounding problem

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Article ID: 470
Last updated: 10 Jan, 2018
Revision: 1
Access: Public
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