Question about Desa International ReddyHeater® R115DT Utility

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I have a reddy heat r100 when I have the top cowl off everything runs fine as soon as I replace the cowl and plug it in the fan starts and then the overload switch trips

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Check for a wire getting piched or pierced by a screw or the cowling. If not look for an air flow pressure switch and be sure it is working.

Posted on Dec 18, 2008

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115,000 btu reddy heater, 5 hrs used in sprayfoam-grinding environment. stopped working. when plugged in, only hums for a few seconds, then stops. how can i fix that?


First, remove the top cover. Inspect for a varmint nest. If clear, manually spin the fan. If it does not you either have a broken rotor that is binding or you have a bad bearing.

If it spins freely, apply power- see if the motor runs with the top cover removed.
If YES, replace the top cover. Its possible that the top is binding the fan.
If NO, the start capacitor is defective. The cap on R115 is internal and is not servicable.

Reading material about a hummer

Nov 04, 2011 | Reddy HEATER R115 115,000-BTU PORTABLE...

1 Answer

As soon as i plug it in. the fan starts to blow **** the flame does not turn on. and the unit shuts its self off automaticaly. I took the cover off of the unit.and then it would fire up. But i do not...


toddbrewer1,

This is a classic All Pro, Reddy Heat, Master Heater, etc problem. They are all made by DESA International and similar in operation. They control fuel pressure by bleed air. As the air filter plugs up the pressure changes and that is why your unit runs with the top off. You allow more air to flow. You need to replace the air filter and set the pump pressure. I have a tip at

http://www.fixya.com/support/r4124129-yearly_maintenance_reddy_heaters

which is written for Reddy Heaters but as I said before they are all the same. It tells you how to complete the repair and where to get the parts.

Thanks for using FixYa and for the great rating.

hardrocko

Mar 01, 2011 | All-Pro Kerosene Garage Shop Heaters - All...

1 Answer

My R100 reddy heater will ignite and run when I have the top of the torpedo off. While running I can put the top on and it runs smoother with less excess fuel. It does not ignite or start with the top...


The air settings may have changed. Anytime you change a filter for the air, or just remove it and reinstall it the air settings change. A small amount of pressure change can cause your issue. These heaters are very sensitve to air pump pressure changes. If you took off the nozzle, you took off the hoses too. Check that the hoses do not leak at the fittings to the nozzle body.I belive there is a sticker on the unit that gives the specs for the air pressure settings. Do you still have your owners manual? It should tell you in there how to trouble shoot the heater, There are 2 screws at the back of the motor, 1 is the pressure gauge port, and the other can be adjusted to set the pressure. It is recomended to use an air gage to set the pressure after any kind of service.You will need a low pressure testing gage. Accurate to 3-6 lbs. NOTE:( tire pressure gages are not reccomended for this) Check those lines, use a clamp or a zip tye to seal them to the fitting. I hope this helps.

warner44z.gif

Dec 23, 2010 | Reddy R155D Utility Heater

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

Thanks

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

1 Answer

Fan runs backwards forces flame to blow back into heater instead


cracked heat exchanger not cheap replace unit ur motor just doesnt change rotation on its own

Jan 13, 2009 | Reddy Heater RLP100 Portable Forced Air...

1 Answer

Model R110 Does not ignite on startup


Check:
  1. be sure the transformer is grounded
  2. If 110v is going in but nothing going to the plug then order an Ignition Device #102482-01
www.reddyparts.com keep them in stock

Dec 25, 2008 | Reddy Heater-30-55,000 BTU Variable

5 Answers

REDDY HEATER PRO 70


I have a Reddy Heater R100 that ran just fine until one day it

wouldn't ignite. I took the cover off to see if it was sparking and it

ran just fine with the cover off. I got on the Internet to see if there

was a definitive answer as to why it would only run with the cover off;

there wasn't. So I decided to troubleshoot it step by step instead of

replacing everything at once. You can thank me later.

Step 1: Dumped out old fuel, made sure the tank was completely dry and

clean. Put in fresh kerosene. This is an absolutely hideous job.

Result: Still would only burn with the cover off. Said bad words.

Step 2: Replaced all three filters. Result: Still would only burn with

the cover off. Didn't say bad words, just thought them.

Step 3: Removed the end filter cover and pushed on the pressure relief

ball. It seemed to be stuck.
so I marked the relief screw, counted the exact number of turns to take

it out, and washed the end filter cover and small parts with Dawn

dishwashing detergent. Harsh solvents can melt the plastic on the end

filter cover. Blew everthing dry. Put a little oil on the spring and

ball so they wouldn't rust. Put the relief screw, spring and ball

together, making sure I turned the screw back in the same number of

turns that I took it out with, within a tolerance of about 1/8 turn.

Result: Still would only burn with the cover off.

Step 3: Downloaded a manual from:

http://www.desatech.com/manuals.cgi?products=Construction%20Heaters to

find out the spark plug gap. They didn't have one for an R100 so I used

the one for a R100EDI. I cleaned and set the spark plug gap to .055".

I think later heaters use .075" or .085". Check your manual. Result:

Still would only burn with the cover off.

Step 4: Removed the nozzle. Put a clean paper towel under the input and

sprayed carburetor cleaner into the output end of the nozzle,

backflushing it. Four or five pieces of crud came out, onto the paper

towel. Really cleaned the nozzle good. Blew it off with compressed air

to make sure all of the carburetor cleaner was evaporated. Replaced the

nozzle. Result: O frabjous day! It worked just fine for about a half

hour, then it started coughing and smoking.

Step 5: Removed the nozzle again. Put a clean paper towel under the

input and sprayed carburetor cleaner into the output end of the nozzle,

backflushing it again. Four or five pieces of crud came out, onto the

paper towel, again. Really cleaned the nozzle good, again. Cleaned the

fuel filter and the upper fuel line. Made sure everything evaporated

before I put it back together. Result: works great with the cover on.

Ran the tank of fresh fuel empty. Put the original fuel back in, it

works too.

So, if in the future, I have the problem where it doesn't burn with the

cover on, I'm going to start with the nozzle, upper fuel line and fuel

filter.

Dec 20, 2007 | Reddy R70ET Utility Heater

1 Answer

Reddyheater r100


the fan must be hitting th upper cowling. see that the fan bracket is fully seated in the cutouts in the lower half of the unit.

Dec 15, 2007 | Desa International ReddyHeater® R115DT...

2 Answers

Reddy heater 110,000 btu forced air portable kerosene


try this, take off the top cover. plug in the heater and when the humming starts, rotate the fan sharply with a screwdriver. keep your fingers away from the fan. if the fan spins under power your start winding is shot. get a new motor. www dot desatech dot com

Dec 06, 2007 | Reddy Heater-30-55,000 BTU Variable

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