Trane Reliatel Rooftop Units
Re: Heat Fault Code 3
Reliatel gas/electric rooftop units have a Heat Control Board as well as the Reliatel Control Board.
There are several version of the Heat Control Board, but two main varieties: 1) Spark ignition and 2) Hot Surface ignition.
The Heat Control Board has an LED for displaying status & fault information. It is very common for the heat faults to not be shown anywhere on the Trane diagrams.
Code 3 = Pressure Switch Fault
The pressure switch should close when the inducer motor starts for a call for heat. A code 3 is generated when the switch fails to close.
| Qty | Likely Causes of Code 1 (from most to least likely): |
| 1 | Bad Inducer Capacitor |
| Bad Inducer Motor | |
| Bad Pressure Switch | |
| Bad Heat Control Board |