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I have a master kerosene heater. there is a fine mist shooting into the chamber but no spark. where would you start to diagnose problem?

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Here is where I would start:

  1. Check the Ignition device (transformer, spark box) for a good ground. If the connection has become rusty, the screw has gotten loose, etc the unit will not spark. Clean & restore ground.
  2. Next, if the ground is good, check to see if the ignition device is getting current. If there is current but there is no spark, then replace the ignition device.
  3. Read these troubleshooting tips.

Posted on Nov 05, 2010

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I have uk115t and when it starts up it


Most spark plug heaters have this characteristic. The fuel is delivered - to the combustion chamber - when the motor starts to turn. The spark starts immediately. Atomization does not take place until the motor reaches full rpm's.

The point I'm making is that there is a bit too much fuel in the chamber at start-up, therefore the flame will run rich until the extra fuel is burned.

You can minimize the effect by replacing the nozzle, setting the pump pressure to factory specs, and stopping all air & vacuum leaks.

How to set the pump pressure

Nov 14, 2011 | Reddy HEATER R115 115,000-BTU PORTABLE...

1 Answer

I hava an All Pro 65,000 BTU heater. It was working fine a week ago. The igniter glows, fuel mists but doesn't light off then shuts down. Ideas?


I am sure you have confirmed that the fuel is fresh and good, no water in it, etc.--
It is kerosene, not #2 Diesel fuel, right?

And the shutting down is good, if the flame does NOT ignite--- :-)
So we have to figure out why the fuel is not getting hot enough to ignite?


Question-- is the oil spray passing close enough to the ignitor?
And this unit does NOT use SPARK to ignite?, correct? --
for most of these heaters have spark ignition.. I am learning all the time, too!

How about checking the fuel pressure. and the air -- is it correct?
Check with your manual how to check and adjust.

After testing these tings, let us know what you learned

Mack B

Jan 15, 2011 | All-Pro Kerosene Garage Shop Heaters - All...

1 Answer

I have universal 150,00 btu/hr and it wont ignite, the nozzle sprays a mist but no spark?


You may have a bad transformer that sends the electricity to the spark plug. Have you tried a new plug?

Jan 10, 2011 | All-Pro Kerosene Garage Shop Heaters - All...

1 Answer

I have a 60,000 btu kerosene heater its getting fuel and the glow plug turns on but still wont fire up n shuts down. what would cause this?


Well it is getting fuel but is it atomized in very small droplet form? If so is your igniter close enough to ignite the fuel? You see these spray a very fine conical mist under high pressure, if the mist is not defined or conical it sprays past the igniter. If it is fine and cone shaped it could be the positioning of your igniter. Please check both by removing the top section of the heater and watch what is going on in there. My thoughts are a bad nozzle and if you replace it pay attention to spray angle and GPH rating printed on the side of the nozzle.

Dec 22, 2010 | All-Pro Kerosene Garage Shop Heaters - All...

1 Answer

125btu reddy heater, somene mixed some gas in the heater and now it won't ignite. how to fix??


Drain it clean it out real good clean out the fuel system end to end. From the line in to the tank thru the filter and so on remove the nozzle clean the screen and nozzle put it all back together. with the top section removed try to start the heater. You should have a fine mist of fuel and spark if it lights shut it down and clean the photo electric eye with a soft cloth and windex. make sure the igniter is clean and close to the fuel mist for ignition, put the top on and turn on your heater.

Dec 14, 2010 | Reddy Heater RH125T Kerosene Forced Air...

1 Answer

I have a master 150000 btu kerosene direct fire heater that runs for 5 minutes then shuts down and blows white smoke. what is the problem?


The white smoke is the kerosene fuel hitting the hot combustion chamber. Your flame has went out. The cause for this could be many. The first thing you need to do is check your fuel. Remove your fuel cap and look at the bottom of the tank for trash or water. Use a good flash light. It will all settle to the bottom. If so, drain and clean out your tank. Add fresh kerosene. Check your fuel filter. Replace if dirty. Test again. If problem continues, It is possible that your photo eye could be deffective or just dirty. It is located next to the ignitor or spark plug. It sees the flame. If the flame goes out, the unit shuts down. The flame has to be smooth (not sputtering). Water in the fuel will make it sputter and the unit will shut down. When the water/moisture in tank settles to the bottom, your suction fuel line is just off the bottom which results in it picking up the water instead of good fuel. Always disgard the old fuel from previous year and start with fresh fuel. This will cut down alot of your problems in the future.

Dec 07, 2010 | Master Heaters B155DST

1 Answer

Do you have a pre-start checklist?


Pre-start checklist?

I assume the heater ran fine last season. If so, assume it will run fine this season. Simply remove the top cover, check the combustion chamber area for signs of visitors such as mice, wasps, dirt dobbers, etc. Remove debris.

We always drain the old fuel & start fresh.

Replace the top cover and fire it up. If it runs fine then leave it alone. If it won't continue to run troubleshoot and find the problem.

Troubleshoot a spark plug type heater http://www.reddyparts.com/SP_tips.htm

Troubleshoot a hot surface ignitor type heater http://www.reddyparts.com/HSI_tips.htm

Sep 23, 2010 | Reddy Heater-170,000 BTU Kerosene Deluxe

1 Answer

Reddy heater model r100a runs approxamitly 15 to 20 minutes then kicks out.fan seems to run fine and already replaced the spark plug.


generally if a heater with a spark plug will run for 10 minutes or longer then that’s an indication that the electronics are functioning properly, so for now, eliminate "any fuel delivery problems" before trouble shooting the electronics. The spark plug should spark for the duration of the run time. If the flame goes out the heater shuts down (just like its designed to do). Imagine the fumes & danger involved if the heater continued to pump raw fuel into a hot combustion chamber!

Some possibilities:
  1. the plastic end cover is cracked. When the room heats up the crack expands allowing the air pressure to fluctuate.
  2. the air pump pressure is not correct. (instructions at www.reddyparts.com )
  3. the fuel filter is restricted.
  4. the nozzle is restricted or worn.
  5. there is an air leak between the pump & the nozzle.
  6. water in the fuel. When a droplet passes through there is a momentary flameout condition which will cause the photocell to shut the unit down.
  7. The photocell is defective
Some more troubleshooting tips

Mar 10, 2009 | Reddy Heater-170,000 BTU Kerosene Deluxe

1 Answer

Heater smokes but doesn't turn on


It sounds like you have a dirty nozzle. Remove and replace with the same type. It may not be spraying a fine enough mist.
Hope this helps.
Matt

Jan 11, 2009 | Reddy Heater-170,000 BTU Kerosene Deluxe

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