20 Most Recent Reddy Heater RH125T Kerosene Forced Air Heater - 125,000BTU Questions & Answers

Could be the Photocell at the back of the burner (flame sensor-try cleaning it off. Or test by jump the connectors. If it works then replace it) Photocells are easy to replace and when you install new one be sure it's pointing straight at the flame.

Reddy Heater... | Answered on Feb 06, 2011

Yes, you can, but make sure to use the proper gauge wire. Don't want to start a fire.

Reddy Heater... | Answered on Jan 27, 2011

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.

Reddy Heater... | Answered on Dec 14, 2010

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

Reddy Heater - Troubleshooting Torpedo Heaters Torpedo Heater Pump Pressure Adjustment


Reddy Heater... | Answered on Oct 31, 2010

Pretty sure this is the manual as i think DESA make them.


Just cut and paste this link

Reddy Heater... | Answered on Aug 31, 2010

Here is a link to a owner's manual for a RL125T ... You can find a wiring diagram on page 19. I hope this helps you.

Reddy Heater... | Answered on Apr 13, 2009

You have fuel and spark but it won't ignite...
The problem must either be the spark or the fuel - the ignition unit isn't an unusual failure so is the spark gap correct; if there is a failing spark there is a temptation to reduce the size of the spark gap.

The fuel, paraffin or diesel isn't very volatile so it must be presented to the spark in a form that is easily burned and that means a very finely atomised spray - problems with the spray are common with older heaters, usually caused by small particles of dirt or rust either making the spinner stick or freeze or wearing the fit between the spinner and jet and the jet orifice and even if the jet is in good condition it is important to have the correct air pressure that is checked and adjusted whenever the heater is serviced.

Paraffin or kerosene has a fairly high content of dissolved water and when the inside of a fuel tank is unprotected steel, the fuel can cause some rusting...
A thorough internal clean and refill with filtered fuel will usually restore performance for the season.

Reddy Heating &... | Answered on Dec 30, 2020

Apparently the photocell needs to see a flame of the correct colour or it will shut down so the nozzle and spinner has to be in very good condition - diesel might be clean but is the inside of the tank clean?
The fit between the spinner and nozzle is so very close it can stick with very small particles.

Can't speak for the Reddy Heater but a bad spark transformer seems a very common problem with that type of heater - ensure the spark gap is correct.

Reddy Heating &... | Answered on Dec 08, 2020

After 19 years of service, your Reddy heater probably is ready for replacement.

Reddy Heating &... | Answered on Nov 16, 2020

Contact Reddy directly to request the manual.

Reddy Heating &... | Answered on Oct 29, 2020

Never try and light a furnace when you have a glow coil ignitor. Even if you managed to do so it would reach high temp and limit would stop it. . trained technician can do this but why? If your glow coil is glowing constantly after start up than mast likely you have a control board problem. Call a technician to troubleshoot it

Reddy Heating &... | Answered on Dec 31, 2019

Replace the sensor,the sensor won't allow the unit to fire if it is dirty or defective,they aren't expensive.probably under 35 bucks

Reddy Heating &... | Answered on Oct 13, 2019

Flame sensor is defective if it is igniting and attempting to burn then goes out replace the flame sensor

Reddy Heating &... | Answered on Oct 07, 2019

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