Troubleshooting Information - Mr. Heater MH4B Operating Instructions Manual

TROUBLESHOOTING INFORMATION:

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! DIFDL
• Spark electrode broken – replace.
• Igniter wire may not be attached to spark
electrode.-- attach
• Igniter wire damaged – replace.
• Piezo igniter defective – replace gas valve
assembly.
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! DIFDL
• No gas to heater – re-install or replace gas
cylinder.
• Pilot is blocked from spider web or dirt – clean
pilot, see MAINTENANCE.
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! DIFDL
• „Pilot/Ignition‰ button not held long enough
to purge air from line.
• Pilot flame not surrounding thermocouple –
clean pilot, see MAINTENANCE.
• Pilot Assembly defective – replace.
• Tip switch wires disconnected – connect
tip switch (check off switch and off switch
wiring).
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! DIFDL
• Main burner orifice is blocked – clean burner,
see MAINTENANCE.
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! DIFDL
• Pilot is blocked – clean pilot, see
MAINTENANCE.
• Provide minimum fresh air opening of 4 square
inches (example 2‰ x 2‰ opening).
• Tip over switch activated from bumping heater.
Re-light
Mr. Heater MH4B Operating Instructions and OwnerÊs Manual
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