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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  • Master
  • 625 Answers

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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