Question about Reddy R155D Utility Heater

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I have a 35000btu kero type reddy heater and the flame will not light. When I used it last I had a lot of paint dust in the air and it just quit. ( I know the dust is not good for safety) I took the top cover off and the fan turns and the spark plug is trying to light, but there is no kerosene coming out for it to light. The photo eye looks clean.

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If there is no fuel coming out, then you must troubleshoot to find out why. The air pump has a dual purpose. It pumps air to the nozzle for atomization and sucks fuel frpm the tank.

Start by troubleshooting the pump by setting the pump pressure.

Posted on Dec 13, 2008


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I have a 50k Kero Reddi Heater. Been using it for years. The last two nights it doesn't get real hot and stinks to hight Heaven. The flame is burning good though. Took air filter off while...

Yes, the fuel line could be obstructed or a dirty fuel filter. The air intake and lint filters could also need cleaning. Don't rule out contaminated kerosene too.

If you have misplaced your Owners Manual, send me the model number of your heater and I'll send you the Owners Manual w/Troubleshooting Guide.

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Heater has intermediate flame only for a few seconds than loses the flame. This is the cycle till it trips.

Oil/kero heater right? Did you check the fuel? If the fuel is okay....the nozzle may need changed. If the nozzle is okay check the electric eye.

Hope this helps you...Jim...Please leave a comment

Feb 13, 2011 | Reddy Heater-30-55,000 BTU Variable

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Our heater will ignite and run for a few minutes then it will shut down and not refire without powerig the unit off. also there is a heavy smell of kerosene. we are using dyed kero. we have tried bypassing...

Thanks for providing the model of your heater. Most folks don't.

Your heater has a photocell eye and a computer board (ignition control). This team monitors the flame. If the team does not like the color of the flame then they shut the heater down and that is the situation you are in. Now, you must troubleshoot & find the problem. Is it water in the fuel, incorrect air pump pressure, worn nozzle, cracked plastic cover, etc.

Read these troubleshooting tips.

Nov 04, 2010 | Reddy R115DT Oil Filled Utility Heater

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I changed filters,but still get eye burning smell,I do use Kerosene

In my experience, eye burning is a by product of burning even the best kero. And at 115,000, you are burning a lot.

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Dec 11, 2008 | Reddy Heater-170,000 BTU Kerosene Deluxe

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Shutting off

the kero heaters aren't really a pain to work on if you have a basic knowledge of what is to happen. Someone reported on one of their heaters that the motor armature was a tad oversized and wouldn't spin. He contacted the dealer and they supplied him with a new motor armature. reddy heat didn't issue a recall because they couldn't find the heaters. Ignition sources are the hot surface igniter or the spark plug type. The motor end air compressors are a vane type with close tolerances. The air pressure is 3.0 - 3.5 psi. The fuel nozzle forms a venturi that produces a vacuum that sucks the fuel up into it. the cad cell or photocell detects the ultraviolet in the flames and completes the lockout relay. no flame no woikee. the detector circuit has a solid state device called a triac. it is just a glorified motor contactor without all the movable contact stuff. it will carry 40 amps when its working right. you can bypass the safety circuit by jumping out the red wire and the black. the fan motor will run all the time.

Dec 29, 2007 | Reddy Heater-170,000 BTU Kerosene Deluxe

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Won't stay running

is this kerosene or propane. if kerosene, two types of ignition is used.  a spark plug or a hot surface ignitor.  the kero unit uses a cad cell flame detector, the propane unit uses a millivolt generator.
the kero unit uses an air pump that comes off the backside of the fan motor - this airline goes to the nozzle and acts like a siphon for fuel.  there is no air pump for the propane heater. the fan just accelerates airflow through the combustion chamber.  the cad cell of the kero unit sees the flame and varies its resistance.  it is sensitive to the infrared generated by the flame and feeds this signal to the lockout relay. no flame after a few seconds, opens and locks out the unit.  the propane unit uses a millivolt generator.  it is a copper cappillary tube that has two spade connectors on it. the spade connectors are connected to a high limit mounted on the backside of the combustion chamber.  under normal conditions the hi limit is closed and completes the electrical circuit to the main valve. the millivolt generator is electrically connected to the pilot/main valve electromagnet inside. with a flame detect signal the electromagnet is energized and holds the main valve slug open allowing the propane to feed to its nozzle in the chamber. as long as there is a flame the valve stays open. no flame, no signal and the unit releases the valve pellet and closes.  you can test the hi limit by jumping out the two spade connectors and see if the unit starts and stays running.da8a32c.jpg

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