Troubleshooting - Mr. Heater MH12HB Operating Instructions And Owner's Manual

TrOuBlesHOOTInG InFOrMaTIOn:
If Spark electrode does not produce spark.
CHECK
• Spark electrode broken – replace ODS (Oxygen Depletion
Sensor).
• Igniter wire may not be attached to spark electrode.
• Igniter wire damaged – replace.
• Piezo igniter defective – replace control valve.
If Spark electrode produces spark but pilot does not light.
CHECK
• No gas to heater – install disposable cylinder or connect
hose and filter where required and turn on valve at remote
cylinder.
• "PILOT" position not properly aligned – turn gas control
knob to "PILOT" position and depress.
• Pilot is blocked from spider web or dirt – clean pilot, see
MAINTENANCE.
If Pilot flame does not stay lit when knob is released.
CHECK
• Control knob in "PILOT" position not completely depressed
or held in long enough to purge air from lines.
• Pilot flame not surrounding thermocouple – clean pilot, see
MAINTENANCE.
• Pilot Assembly defective – replace.
• Tip switch wires disconnected – connect.
If Main burner does not ignite.
CHECK
• Main burner orifice is blocked – clean burner, see MAINTE-
NANCE.
If Heater keeps shutting "OFF" during normal operation.
CHECK
• Pilot is blocked – clean pilot, see MAINTENANCE.
• Provide minimum fresh air opening of 9 square inches
(example 3" x 3" opening).
• Tip over switch activated from bumping heater. Re-light.
• Regulator defective - Replace regulator.
• Internal contamination - Replace control valve and regulator.
• Call Technical Services for additional information.
Mr. Heater | Portable Propane Heater
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Operating Instructions and Owner's Manual