Question about Reddy R60A Utility Heater

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My heater will fire up with no problem, run for 5 - 15 minutes then shut off. I can unplug it then plug it back in and it will run for another 5 - 10 minutes and shut off again. There's no theremostat so it no like it's reaching temp and shutting off. Whats up?

Posted by michaelgigli on


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Hi and welcome to FixYa, I am Kelly.

Download this service manual:

You may have a dirty Photocell as discussed on page 19 but you can have other issues. The manual will help you sort it out.

Things to look at are:

  • Photocell
  • air filters
  • fuel nozzle
  • fuel hoses
  • fuel tank cap
  • fan clearances
Everything I listed is covered in the manual link at the top of this post.

Thanks for choosing FixYa,

Posted on Feb 14, 2011


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1 Answer

Heaters fires, stays on for 10 seconds, then burner turns off

Just had the same experience.
1. Pull the top cover off and try gently wiggling the printed circuit board on the right side top. Pull the thermostat mounting board too if it helps. Be careful as it is still live as you are doing this. If it fires, unplug it & remove the board from the unit. Get a magnifying glass and a good light and go over the solder connections on the back of the board, ALL of my connections where the harness plugs into the board were cracked. Best as I can figure, the board is mounted right next to the power vented flue discharge and it is extremely hot there and must expand & contract with heat especially if wind is blowing the heat back onto the unit. Re-solder connections & mount the board somewhere else in the unit.
2. The igniter assembly acts as a thermocouple, which is to say it "proves" the flame to the unit telling the gas valve to stay open and the spark to shut off as long as the thermostat wants the unit to run. That component may have failed & requires replacement.
3. The flow switch (Pressure sensor) proves water flow to the unit saying it is ok to fire. I've replaced mine twice due to them busting open, but that can also hold out the unit if it doesn't sense flow,however but I doubt that is the culprit. It is easy to test, just make sure the pump is on, jump the wires & turn on the unit. MAKE SURE to put them back on after testing as the water will boil very rapidly if the unit runs with no flow which is extremely dangerous.

I would check these components in that order.

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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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My best guess is that you are are connecting to your AC receptacle with an extention cord that is too small. The Reddy Heater contains a computer that will shut the unit off if it cannot pull enough amps from your service. The longer the cord the higher the loss from receptacle to unit. This loss can be reduced by increasing the size of your extention cord. I run a 100' 10/2 cord.

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I have model 5532, but I think they all have the same problem. There seems to be a safety device in the ceramic heater that turns off if it gets too hot. It "remembers" when this happens as well and will shut off until it is unplugged for 10-15 minutes.

This happens on even lightly used heaters if used in dusty conditions. Dust builds up behind the ceramic heater and the lack of flow causes it to overheat. The unit must be dismantled and the dust brushed/vacuumed out. The good news is that not only will the heater work again, but it will have better airflow too!

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