Question about Reddy R155D Utility Heater

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RM115 Reddy Heater forced air heater problem

Heater ignites and runs a short while then goes out.Instaled fresh kerosene (no water), adjusted air pressure to 5.3,cleaned unit , removed and cleaned nozzle and filters.Still runs short time and goes out. Photocell, ignition controll board, ignitor???? Help.

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  • bkdaniel Jan 08, 2008

    I have the same problem on my R55C unit. While trying to diagnose the problem the ignition "spark plug" burn out. So, I have ordered a new "spark plug" and I am also ordering a new photocell. It seemed to try to reignite if I shorted across the photocell so I will try this easy solution. How would I be able to tell about the air pressure? Any other solutions to my problem?

  • 758h Feb 10, 2008

    70,000 btu reddy heater blows blue smoke runs for a short time then trips the reset button. I cleaned the unit and everything seemed fine

  • Michael Chipman
    Michael Chipman Oct 25, 2008

    plug heater in turn on set thermostat to medium runs five min then blows blue smoke shuts down and won't turn back on until turned off and then back on i'm thinking control board turns off igniter ?

  • Robert Johnson Nov 27, 2008

    My Mr. heater 210,000 shuts down and diagnostic code shows over limit switch.

  • Anonymous Dec 14, 2008

    90000 btu reddy heater, comes on, works fine then goes out

  • iowacc Dec 21, 2008

    I have this same problem. TWICE. I bought a NEW Reddy Heater 5 weeks ago and its run AWESOME until last week. Then it refused to start. Same symptoms as all these others. Since it was Brand new, I took it back, got a NEW one, and it fired right up. Then just now, after 5 days, it STOPPED and won't stay on any more. Its not the fuel, it can't be the unit, and the ONLY constant, is the BOTH FAILURES occurred when it was BELOW ZERO. When it is 20+ degrees out, it will fire and run. When it is -4, NO WAY. DEAD. What use is a heater that won't fire when it is cold ??

  • tbear997 Jan 01, 2009

    I have a one year old rm115 that is doing the same thing_ appears to be no pattern to when it stops all I have to do is switch the heater to off then back on it starts and runs but will stop again . I have noticed that it seems to work better when in a heated building. 

  • Anonymous Jan 13, 2009

    reddy heater 110000 runs thirty seconds then shuts down in a cloud of smoke

  • Anonymous Jan 17, 2009

    My unit will only run for a brief secound.



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I had close to the same problem i drain the tank added new fuel still no diffrence so i removed the filter going to the tank pick up flushed out with brake clean it work fine for half a day . I knew then i was on the right track . I went to the local hardware store and bought a tune up kit that had the filter in it,I replaced the filter going to the tank pick up and it's been working fine even in cold weather. Fuel quality has a big part to play in it's abbility to burn in colder tempicures.

Posted on Jan 16, 2009

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Air pressure should be no more than 3.5 psi. could be your pressure is too high and is blowing out the flame.

Posted on Dec 06, 2007

  • Charles Minally
    Charles Minally Mar 02, 2014

    how do I adjust nozzle pressure?


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We have several of these at the factory we operate. Typically, when they go bad, the carbon vane kit needs replaced. There is a small gasket that can leak as well.

Posted on Jan 15, 2009

We are having the same problem with our hearter as gasguy. any body out there have a solution for us?

Posted on Jan 28, 2008

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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

Running very rich. how to adjust fuel and air screw

First of all are you running kerosene or diesel ? If you are using diesel, it does not burn as clean as kerosene which causes that burning rich smell. If you are going to use diesel, just use #1 diesel only but still may have a little rich smell. Don't use die red off road diesel. If you are using kerosene and want to check your air pressure on your pump, you will need a 10 lb. test gauge with a 1/8" NPT male pipe thread on the end of the gauge.There are 2 plugs on the back plate. Do not remove the upper plug with the hole in it. This is the adjustment screw for pressure. Clockwise increases pressure, counter clockwise decreases pressure. With the heater unplugged,remove the lower plug. Screw the test gauge in and start the heater. Check the pressure. Most are set between 5 1/2 and 6 lb. of pressure. Check your owners manual to see what your setting should be. If your pressure does not change, you have a worn pump and it would have to be repaired. Once you have the correct setting, unplug the heater, remove the gauge and install the plug back. If you feel that you are not qualified to perform this procedure, send it in to a local repair center.

Jan 11, 2011 | Reddy Heater-170,000 BTU Kerosene Deluxe

1 Answer

Heater keeps shutting off what could it be cant find manual to help

Use this manual to assist you in troubleshooting.

The manual will help you isolate the problem.

Things than can cause your symptoms:

1. Pump pressure incorrect

2. Dirty air intake, air output

and/or lint filter

3. Dirty fuel filter

4. Obstruction in nozzle

5. Photocell assembly not properly

installed (not seeing the flame)

6. Dirty photocell lens

7. Bad electrical connection between

photocell and ignition

control assembly

8. Defective photocell

9. Defective ignition control


10.Line voltage is below 108V or

above 132v

REMEDY corrosponds with 1 - 10 above

1. Fill tank with kerosene

2. See Pump Pressure Adjustment,

page 10

3. See Fuel Filter, page 11

4. See Nozzle Assembly, page 12

5. Drain and flush fuel tank with

clean kerosene. See Storing,

Transporting or Shipping,

page 7

6. Check electrical connections.

See Wiring Diagrams, page 16

7. Replace ignitor, see page 11

8. Replace ignition control


9. Check for proper line voltage

1. See Pump Pressure Adjustment,

page 10

2. See Air Output, Air Intake and

Lint Filters, page 10

3. See Fuel Filter, page 11

4. See Nozzle Assembly, page 12

5. Make sure photocell boot is

properly seated in bracket

6. Clean photocell lens

7. Check electrical connections.

See Wiring Diagrams, page 16

8. Replace photocell

9. Replace ignition control


10.Check for proper line voltage.

Disconnect power equipment

that may be used on same

Thanks for choosing FixYa,

Jan 09, 2011 | Reddy HEATER R115 115,000-BTU PORTABLE...

1 Answer

It is kerosene, it ignites, runs from 1 - 5 minutes and loses flame


Here are a couple of tips that I wrote that tell you how to troubleshoot a Torpedo or Reddy heater...

Reddy Heater - Troubleshooting Torpedo Heaters

Torpedo Heater Pump Pressure Adjustment



Dec 14, 2010 | All-Pro Kerosene Garage Shop Heaters - All...

1 Answer

R100 reddy heater, low pressure forced air heater. the heater ignites, motor runs for 30 seconds then shuts down. photo cell good, filters clean, no ignition board, pump pressure unknown.

The R100 is a kerosene heater and the RLP100 is a propane heater so I am not sure when one you have.
If it is kerosene then you may need to check the pump pressure. Also the Safety swith can give you a cut out after 30 seconds.

If the unit is Propane then you could have a bad control board or a flame sensor.

You can call our service department at 1-800-475-5660


Oct 21, 2010 | Reddy Heater RLP100 Portable Forced Air...

2 Answers

Reddy heater has spark but no fuel to ignite it?

the black hose that goes to the back hooks to a pump on back of motor take screws off back and filter clean when back together turn fan by hand and should hear a small vacum at back of motor , not pluged in clean nozzel

Apr 13, 2009 | Reddy Heater-170,000 BTU Kerosene Deluxe

1 Answer

Will not fire

this unit operates with a small air compressor at rear of motor. Remove the solid 1/8 inch plastic plug. install a low pressure gage. you should read around 5 psi

Feb 28, 2009 | All-Pro Kerosene Garage Shop Heaters - All...

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