Trane DHC036H3*(L,M,H,X,Y,Z)B Ignition Off: No power or ignition-board failure
The Trane Precedent gas heat fault-code table identifies ignition-board LED off as no power or board failure.
Trane DHC036H3*(L,M,H,X,Y,Z)B Ignition Fast Flash: Ignition board not communicating with RTRM
The Trane Precedent gas heat fault-code table identifies fast flash as not communicating with the RTRM, with communication wiring, ignition module, or RTRM concerns listed as possible issues.
Trane DHC036H3*(L,M,H,X,Y,Z)B Ignition 2 Flash: System lockout from flame-sense failure
The Trane Precedent gas heat fault-code table identifies 2 flash as system lockout from failure to sense flame, with low-voltage grounding, gas valve, ignition board, flame sensor, wiring, burner crossover, or board issues listed as possible causes.
Trane DHC036H3*(L,M,H,X,Y,Z)B Ignition 3 Flash: Pressure switch fault
The Trane Precedent gas heat fault-code table identifies 3 flash as pressure switch failed to open or close, with pressure switch, combustion blower, hose, flue fitting, airflow, or board concerns listed as possible issues.
Trane DHC036H3*(L,M,H,X,Y,Z)B Ignition 4 Flash: High-temperature limit circuit open
The Trane Precedent gas heat fault-code table identifies 4 flash as TCO-1 or TCO-2 high-temperature-limit circuit open, with wiring, airflow, filter, indoor blower, switch, or board issues listed as possible causes.
Trane WHK300A(3,4,W)**0***4 Cool + Service: Static pressure transducer diagnostic
The Trane ReliaTel fail-code article identifies cool plus service as a static pressure transducer output failure or negative supply-air-pressure reading on configured units.
Trane WHK300A(3,4,W)**0***4 Cool + Service: Static pressure transducer diagnostic
The Trane ReliaTel fail-code article identifies cool plus service as a static pressure transducer output failure or negative supply-air-pressure reading on configured units.
Trane WHK300A(3,4,W)**0***4 RTRM LED2 2 Flashes: ReliaTel diagnostic present
Trane ReliaTel support documents identify two Green System LED2 flashes every two seconds as one or more diagnostics present. The diagnostic can include fan, sensor, compressor lockout, defrost, gas heat, smoke detector, Frostat, communication, static-pressure, or discharge-air-sensor issues depending on the unit configuration.
Trane WHK300A(3,4,W)**0***4 RTRM LED2 2 Flashes: ReliaTel diagnostic present
Trane ReliaTel support documents identify two Green System LED2 flashes every two seconds as one or more diagnostics present. The diagnostic can include fan, sensor, compressor lockout, defrost, gas heat, smoke detector, Frostat, communication, static-pressure, or discharge-air-sensor issues depending on the unit configuration.
Trane WHK300A(3,4,W)**0***2 Cool + Service: Static pressure transducer diagnostic
The Trane ReliaTel fail-code article identifies cool plus service as a static pressure transducer output failure or negative supply-air-pressure reading on configured units.