Question about Reddy Heater-170,000 BTU Kerosene Deluxe

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Reddy heater model r100a runs approxamitly 15 to 20 minutes then kicks out.fan seems to run fine and already replaced the spark plug.

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Generally if a heater with a spark plug will run for 10 minutes or longer then that’s an indication that the electronics are functioning properly, so for now, eliminate "any fuel delivery problems" before trouble shooting the electronics. The spark plug should spark for the duration of the run time. If the flame goes out the heater shuts down (just like its designed to do). Imagine the fumes & danger involved if the heater continued to pump raw fuel into a hot combustion chamber!

Some possibilities:

  1. the plastic end cover is cracked. When the room heats up the crack expands allowing the air pressure to fluctuate.
  2. the air pump pressure is not correct. (instructions at www.reddyparts.com )
  3. the fuel filter is restricted.
  4. the nozzle is restricted or worn.
  5. there is an air leak between the pump & the nozzle.
  6. water in the fuel. When a droplet passes through there is a momentary flameout condition which will cause the photocell to shut the unit down.
  7. The photocell is defective
Some more troubleshooting tips

Posted on Mar 11, 2009

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I have a tip at http://www.fixya.com/support/r4124129-yearly_maintenance_reddy_heaters which explains the problem, how to fix it and where to get the parts.

Thanks for using FixYa and for the great rating. Please consider a testimonial. Thank you.

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If the heater runs fine for the 15 or so minutes without smoke/odor- do this
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You don't state whether this is a spark plug heater *or* Hot Surface Ignitor type. I made the assumption you were inquirung about a Spark Plug Heater. Disregard the list if the heater is an HSI type---- troubleshooting is different.

More troubleshooting tips for a Spark Plug Type heater

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I NEED NEW SPARK PLUG FOR A REDDY HEATER MODEL R100A


You can order it from here.
http://www.desatech.com/product.cgi?products=Construction%20Heaters

I would just pull it out and see if you can get at a local auto supply store first.

Good Luck

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