RS Troubleshooting

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Blower Motor Fails to Run

Blower Motor Fails to Run

  • Is the thermostat calling for heat? Is there 115V at the burner receptacle?
  • Check blower side door for seal. Repair if necessary.
  • Check blower for obstructions. Replace blower if necessary.

No Gas Supply

No Gas Supply

  • Check to see if manual supply valve to heater is ON.
  • Check to see if gas valve knob on heater gas control is ON.
  • Supply gas pressure can be checked at 1/8" NPT pressure tapping in gas supply system.
  • Is combination gas control opening? No manifold pressure indicates valve is closed. Gas pressure downstream of gas control can be measured by  connecting a manometer to pressure tap on control. If the valve is closed, either the gas valve or the ignition module is faulty.

Burner Does Not Light

Burner Does Not Light

  • Is spark visible through site glass during ignition trial? If no, further electrical checks by a qualified service person are probably necessary.
  • Check to see if gas lines were properly purged of air.
  • Check inlet and outlet gas pressure during ignition period.
  • Check for orifice and air plate obstruction.

Burner Does Not Stay Lit

Burner Does Not Stay Lit

  • Check ground wire continuity.
  • Check insulation on the igniter leads.
  • Measure flame signal current; it should be above 0.8 micro amps DC.
  • Replace module if necessary.