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On mh80cv i have yellow flame whitch smokes what to do

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Is this a gas fired heater? If so, something has changed. Could be your air/gas mixture got bumped and is out of wack or the gas coming into the house is dirtier than it normally should be. Let me know if you have natural gas or propane.

Posted on Sep 28, 2010


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How do I get my furnace to stop smoking and make my burner flame turn blue

This is an oil heater with a wick, or an oil furnace?

If it smokes the wick is too high and the burner is not burning all the gases produced by the hot oil in the wick.

Use the wick trimming tool and then relight it. Light the wick and then lower the flame until it is blue.

With a furnace, you need to open the front, clean out any soot and clean the spinner in the middle. You may need to regulate the air mix intake to get a blue flame. If it is yellow, you need more air.

If it's gas, you need an engineer.

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Can the mr. heater mh80cv be converted to natural gas, and if so what do i need.thank you

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Why is my flame too big, it is making it smoke

Hi, not knowing what kind of heater you have I can only guess. If it is a central system, and the pilot flame is tall, yellow and smoking, it may have something like a cob web in the pilot tube that will need to be cleaned out. If you have a main gas valve in front of you, there is a pilot adjustment on it, it will say, and some have a small silver cap over the screw. You can take a very small flat head driver and adjust the height of the pilot, and this will take care of the problem. I have found insects that have crawled into the tip of the pilot tube and get cooked, causing a high yellow flame many times in my field of repair. Look it over good, and find the adjustment screw and give this a try. Just turn it one way or the other to see which way will raise or lower it, and hopefully this will solve your problem. Please keep me posted on the outcome.
A/C, & Heating Contractor
PS, you want a nice small blue flame with a slight yellow tip, so turn it down. If it stays the same in any direction, you will need to remove the pilot tube and clean the end out.

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I turned my propane fireplace on and it set my smoke alarm off. We have lived here for three years and never had this problem before. Please advise.

check to see if the flame is pure blue. if not you have incomplete combustion letting CO or CO2 into the room. The flame will look yellow if this is the case. An orange flame indicates dust and dirt around the burner assembly. If it is yellow, the should be 1-2 set screws on the back of the burner assembly that will let you adjust the primary air being mixed with the propane.Adjust until you get blue flame and tighten set screws.

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Are the flames still yellow? If so the burner just needs to be adjusted which is very easy? Look at the ends of the tubes that come out of the burner and end right at the back of the gas controls. You should see a small piece of metal that will slide or spin to close a hole. You want to close or open it a little at a time while the grill is burning. Adjust this until you only see blue flame or blue flames with a little bit of a yellow tip.

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