Trane Package Unit: YCH Re: Ignition Lockout Codes Trane YCH package units are multi-stage gas/electric units. These units have a separate ignition control board which controls all heating functions except the indoor blower. The ICB has a diagnostic light to indicate heat status. ...

Trane Package Unit: YCH Re: Heating - Code 2 Code 2 = Failed to Sense or Sustain Flame (3 tries) Qty Possible Causes: 2 Bad Glow Plug Bad Ignition Control Board (ICB) Bad Gas Valve No Gas Busted Burner CHECKOUT: 1. Prepare for...