Trane error codes
1 documented code with ranked causes, repair costs, and step-by-step guidance.
Trane Furnace — Code 90 (2 blinks) Trane Furnace Code 90 (2 Blinks): Causes & Costs Trane or American Standard furnace flashing code 90 / 2 blinks? What this inducer and pressure-switch fault family means, safe checks, and repair costs.