Question about Reddy Heater-170,000 BTU Kerosene Deluxe

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Reddy heater pro 110

Will run for awhile and shut off, start to puff first. I did the following:
1 adjusted pressure to 5#
2 checked and cleaned fuel filter
3 checked for air leaks
4 cleaned photo cell lens

It has strong ignition and it will run pretty reliably without the top on it, soon as i replace top it will start to puff

Thank you for any consideration

Posted by on

  • aalimoman Dec 07, 2008

    I have simple spark plug ignition, older unit that has worked great for years. The running great without the top is a mystery to me. Will ckeck for cleanness of fuel.

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Does your heater use the older spark plug technology or the newer Hot Surface Ignitor (HSI) technology?

Without this critical information about all this technician can do is guess.

My best guess at this time would be either water in the fuel or a restricted fuel filter.

As stated above, I was only taking a wild guess to a solution based on the information provided by you. If the filter does not cure the problem then answer the question that I asked you to answer previously.

Again, here's the question "Does your heater use the older spark plug technology or the newer Hot Surface Ignitor (HSI) technology?"

Here's why I asked the question- Spark plug heaters are simple to work on and simple to troubleshoot. The solution that I posted could probably solve your problem.

On the other hand, if your heater has Hot Surface Ignitor technology, then there is a computer on board and you must troubleshoot to determine whether the problem is fuel related or electronics related.

Don't just throw parts at the heater, hoping for a fix. Troubleshoot it, then throw the parts.

OK. If your heater has a circuit board, then it is an HSI type heater.

Again, did you check for water in the fuel. You never said. Simply shine a flashlight in the tank- look for water droplets rolling around on the bottom.

In a hypothetical situation here is what happens. The heater is running good. Then a droplet of water passes through the nozzle. A momentary flameout condition. A big puff of smoke & unburnt fuel. The flame perpetuates itself, but the flame has been extinguished by the water. The photocell sees the lack of flame and directs the board to shut the heater down. The heater has done its job. For safety reasons it can't just continue to pump fuel into a hot combustion chamber.

Go back to basics and check for water in the fuel before you check the board. You may just get out of this do-it-yourself project for FREE. No parts required.

From DESA's tech bulletin to test the board
"Remove fuse cover and check fuse
(70,000 to 200,000 Btu models only). If
fuse is blown replace it with a GMA-10
fuse. Disconnect motor red and white
wires from control. With Ignitor wires disconnected,
attach voltmeter leads to the
ignitor terminals (labeled IGNITOR). Use
the 0 to 200 V.A.C. scale. Plug power cord
into a grounded 120V/60 Hz outlet. Meter
should read 120V(rms) for approximately
10 seconds. If voltage reads 0 or stays at
120 for more than 10 seconds, the control
is defective and should be replaced.

Posted on Dec 05, 2008

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My best guess at this time would be either water in the fuel or a restricted fuel filter.

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