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Mr. Heater Buddy won't stay lit. Lack of air is not the problem. Can't figure out how to get it apart to see what might be wrong.

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  • mikeihli Nov 10, 2010

    undoubtedly one of these solutions will work if I can figure out how to get the unit apart to do the troubleshooting and servicing. Is there a diagram or secret to doing this?



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Which model do you have?
If Spark electrode does not produce spark.
• 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.
• 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.
• 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.
• Main burner orifice is blocked - clean burner, see MAINTENANCE.
If Heater keeps shutting "OFF" during normal operation.
• 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.
One can ask Mr. Heater a question at the following website:

Posted on Nov 06, 2010



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1. oil the bearings,sae 30 or wd40 for places you cant get into.
dont take fan motor apart unelse you realy have to.

dont let your fan motor bearings get worn egg shaped from lack of oil.
2. make sure fan blades not hitting or scraping fan housing and fan blades are securely fastened to fan motor shaft. heater fan motor is 12 volts DC , so it may have a segmated comutator and brushes.

I dont know because i have not yet needed to take my mr heater
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in the past 65 years.
4. keep fan motors from getting wet. they hate water.
5. keep fans clean, they dont like foriegn materials.

Your specific problem: first fan 2 weeks,second fan 2 months.

how much you use them, are you wearing the brushes down?
Getting fan motor wet? foreign material getting pulled into fan or fan motor? off/on switch work ok. batterys good,battery contacts ok? fan transformer 110 vac to 12 vdc good? fan bearings oiled?
need more info to diagnose properly.
all of the above needs to be checked out to tell whats happened.
fan & fan motor needs to be inspected.

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