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After initial start up the heater only runs 5 seconds then trips

The reset button and shuts down. reddy heater 155 5 yrs. old

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  • dsabo Dec 30, 2008

    As I looked for the FENWAL IGNITION CONTROL ,I removed the top half of the ignition barrel housing and found a mouse nest around the sparkplug and fan blade.After cleaning out the nest with airhose and putting the top back on, it fired up and runs fine.

  • Anonymous Mar 18, 2014

    sometimes runs for 2min and other times 20min but always seems to trip the reset.

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REPLACE FENWAL IGNITION CONTROL.AND BE DONE WITH IT.

Posted on Dec 17, 2008

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My heater is a.pro 155 it worked fine all last year but I got it out of my storage area for use this winter. It will start an run for about 15 seconds and trips the reset on the unit. What would make this...


First, locate the true model of the heater. Pro 155 only designates a series of heaters. It does not designate the actual model or technology used.

The reset (Safety Device) is the system's safety shut off. If everything is in perfect operating form the photocell looks into the chamber for a flame. If the flame goes out (flame-out), the the photocell sends a signal to the reset and the heater shuts down.

You must troubleshoot to find out whether your problem is a fuel delivery problem or an electronics problem.

My first look would be to look into the eye of the photocell for an insect or nest of some sort. Next check the fuel tank for water or debris that may be restricting the fuel flow and causing a flame-out.

Check out this link for more tips

Nov 05, 2010 | Reddy Karosene / Desel Forced Air Heater...

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150,000 BTU propane Reddy Heater shuts off after ignition


Is there a frost line on your LP tank, if so you may need to replace the tank with a larger tank or refill your tank. This can happen if the tank your using is too low or too small (use 100 lb tank or greater). If there is no frost line it may be an issue with the thermocouple. The manufacturer offers a service manual and owner's manuals on there site. This should assist you... www.desatech.com Thank you

Jan 28, 2010 | Reddy HEATER RLP100 100,000-BTU PORTABLE...

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Reddy pro155 runs for 3 to 5 seconds


Reply with the correct model number. "Pro 155" designates a series. We need to know whether you have a heater with a spark plug or a heater with an ignitor (glowbar).

Feb 01, 2009 | Reddy R155D Utility Heater

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I have a Reddy heater pro 155.


Check all of your air filters but most likely it's the CAD flame sensor.

Jan 22, 2009 | Reddy R155D Utility Heater

1 Answer

Unit will start, run about 5 seconds and


You did not state the model numbers of the heaters, so a good guess is all that I can do. Manuals might be available, but models are a must.

By your description the heaters are Hot Surface Ignitor types, opposed to the older technology spark plug heater. Right or wrong? Technology is different & troubleshooting is different.

The heaters are shutting down because the photocell is not seeing the flame, or the flame color is not absolutely correct. The photocell tells the computer to shut the heater down for safety reasons. It's going to be your job to troubleshoot and find out what's wrong.

READ these tips

Jan 06, 2009 | Reddy Heater-30-55,000 BTU Variable

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I have an R50 Reddy heater. It will start and run and heat for about 4 mins, then it shuts down. Then I push the reset button and it will run approx. 5 soconds then shut down. What do I do and will it be...


If the heater runs good & smells good while its running, but shuts down for no apparent reason, then most likely, you have either a bad Safety Control HA3003 (reset) or a bad photocell HA3019.

But, don't rule out simple problems like:
(any of the following can cause a flameout condition, in which case the photocell will shut the unit down. This is where trouble shooting comes into effect).
  1. loss of ground at the Ignition Control (transformer)- not screwed down good
  2. restricted fuel fulter
  3. restricted or worn nozzle
  4. air pump pressure not set to specs
troubleshooting tips

Dec 04, 2008 | Reddy Heater-30-55,000 BTU Variable

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