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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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Http://www.mrheater.com/ProductFamily.aspx?catid=41

Which model do you have?
TROUBLESHOOTINGINFORMATION:
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 MAINTENANCE.
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.
---
One can ask Mr. Heater a question at the following website:
http://www.mrheater.com/ContactUs.aspx

Posted on Nov 06, 2010

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Pilot will not stay lit on my mr. heater buddy. where do i get a thermocouple for this buddy model no. MH9BX


First follow this trouble shooting guide to make sure you need one-http://www.mrheater.com/product/faqs/little-buddy-troubleshooting/ Then Amazon http://www.amazon.com/Mr-Heater-Pilot-Assembly-Portable/dp/B008DBRB8W Make sure it's the right one for your model heater.0810snp

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My little buddy heater wont stay lit


If there is a draft it will blow out, if you run into it there is a safety shut off. If neither of those are the problem then I would check your regulator.

Feb 15, 2015 | Mr. Heater Heating & Cooling

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Won stay lit


I see this is an old question that didn't get an answer. I'm sure others will need the answer.
"Buddy" heaters can be used with a small tank or external tank with a hose.
From User's Manual: "Use with a Remote Refillable Propane Cylinder ONLY when the Cylinder is Located Outdoors and the Heater is Used with Mr. Heater Hose No. F273701or F273702 and fuel filter. F273699. Fuel filter must be replaced annually."

I learned the hard way. If your heater was used with an refillable tank with hose and you did not use a F273699 fuel filter then you've gummed up the Control Valve and probably the internal regulator.

I talked Mr Heater <website at mrheater dot com> into emailing me a guide to fix it. The company does have great customer support. The 2 parts did cost me $59.00
onedrive live com

Nov 30, 2013 | Mr. Heater MH9B Ceramic Utility

1 Answer

Big buddy Heater - 20 lb tanks won't keep pilot lit,


I had the same problem I called tech support and they said to turn the valve on the 20# cylinder on very slowly for the first 1/4 turn then all will be fine. There is an excessive flow check valve that causes restricted flow when the valve is opened quickly----------mine works fine now

Apr 09, 2013 | Mr. Heater Mr Heater Portable Buddy...

1 Answer

When I press down and turn the know the pilot lights but as soon as you let up on the knob to turn it there is a click and the pilot light goes out.. This is on my Mr. Heater Big Buddy


When the pilot lights continue holding the button down for a full minute and then release. It should stay lit then to allow you to turn it to the on position. If the pilot will not stay lit after holding it for the full minute, then the thermocouple will need to be replaced.
Hope this helps.

Sep 16, 2011 | Mr. Heater Big Buddy Heater

1 Answer

Im on my 2nd big buddy and both of them the fan has gone out, the first on went in a week, and this one last a couple of months.


fans
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.


3.mr 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
fan motor apart but i have worked on hundereds of ac fan motors
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.

Feb 21, 2011 | Mr. Heater Big Buddy Heater

1 Answer

My Mr Heater Buddy heater 4000 to 9000 btu unit work fine with 1 lb propane tank but when I connect it to my 20 lb tank with hose it will not stay lit. Acts like there is not enough gas pressure. My 20 lb...


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My mr heater mh9b won't stay lit. The pilot flame starts acting wierd and making noise after ten to fifteen minutes of being lit and then goes out completely. It can be re-lit but goes out again in a...


my mr heater mh9b won't stay lit. The pilot flame starts acting wierd and making noise after ten to fifteen minutes of being lit and then goes out completely. It can be re-lit but goes out again in a bit. Any suggestions?

Nov 17, 2009 | Mr. Heater MH9B Ceramic Utility

5 Answers

Stays lit for 25 minutes and shuts off


How large and sealed of an area are you using it in? I ask because those units have a low oxygen sensor which will shut it down if there is not enough oxygen in the space.(kinda prevents that pesky suffocation thing). Otherwise if using it in larger cold spaces, the issue is can be from the smaller tanks. As mentioned above, a larger tank can solve this, because these units have a fairly good input rate, which will cause the smaller tanks to freeze, and lower the propane temperature and evaporation rate, basically runs out of gas until the tank warms back up.

Jan 19, 2009 | Mr. Heater (F274825)

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