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No spark to igniter

When I plug the unit in, the fan starts and fuel sprays out of nozzle. I am not getting any spark to the igniter. What type of voltage should I be sending to the igniter module?

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The ignitor does not spark- it glows.

Posted on Dec 23, 2008


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Heater would not start this morning It tried for a second and then just would not ignite. it was running fine yesterday


Take the top cover off of the unit. Plug it in and look at the ignitor for a bright glow or spark, depending on your ignition source. This should happen before the fan starts. Once the fan starts you should be able to see fuel spraying out of the spray nozzle. If there is no fuel, check the fuel screen, air output from the pump, air filters on the pump, and the correct air pressure from the pump. The nozzle can also be dirty. Check for air leaks on the pump by spraying soapy water on the pump while the blower fan is running.

Jan 18, 2011 | All-Pro Kerosene Garage Shop Heaters - All...

1 Answer

It is full of kerosene however when I plug it in to start, it will not turn on. It makes the effort for about two or three seconds then turns off


The safety is turning it off because it is not lighting. You did not mention if it was actually trying to light, or if it was just the motor running. If it is not lighting, take the top cover off and watch the ignitor. Depending on the type of ignitor, it will either glow or spark when you plug the heater in. This should happen before the fan starts running. Once the fan starts, you should be able to see a mist of fuel coming out of the nozzle. If there is no fuel spray you may have an air pump problem, which is on the back of the motor, or the fuel screen in the tank may be plugged.
1. Check for ignition source
2. Blower motor should start, if you have ignition
3. Fuel should spray out of nozzle, if not check filter and check for air flow out of the pump.
4. If you do not have any air flow, or not enough air flow check the pump. Pressure out is critical.
5. If pressure is too low check for leaks around the pump. Spray soapy water on the back side of the motor/pump housing. The plastic pump cover is bad about cracking, and the cracks are very hard to see. The plastic cover could also be loose on the pump.
6. While on this end of the pump; the filters need to be clean, as they will affect the pump pressure and upset the whole apple cart.

Jan 18, 2011 | Reddy Heater-30-55,000 BTU Variable

1 Answer

Heater will not start


Does the blower motor start when you plug it in/turn it on? It may take around 5 seconds if your heater has a HSI(hot surface igniter). If it does you need to check the igniter and the fuel flow. Either way, remove the top of the heater. You will be able to see the fan, igniter, and fuel nozzle. Turn the fan by hand to see if it turns freely. If it does, watch out for the fan and turn the heater on. Look for the igniter to start sparking (spark plug type) or glowing (HSI type). Next, use a flashlight to look for fuel spraying from the nozzle. If fuel isn't spraying, try cleaning the fuel nozzle and check the fuel filter. Watch out for the HSI, if you have one, they are very brittle and easily broken. If you still don't have fuel flow after cleaning the nozzle and the fuel filter, you may have an air pressure problem. Let me know and I will tell you how to check it. Don't forget to rate the answer if it works.

Jan 03, 2011 | Reddy HEATER R115 115,000-BTU PORTABLE...

1 Answer

Fan kicks on and heater will not ignite


Remove the top of the heater and turn it on. Look for the igniter to start sparking if it uses the spark plug type igniter or if it uses a HSI type, look for it to start glowing. Next, use a flashlight to look for fuel spraying out of the nozzle. If it isn't check the nozzle for a clog. Check the fuel filter. Remove the filter cover on the back of the motor and check the air filter. If this doesn't get the fuel going you will need to get a pressure guage to screw into the left hole in the filter cover and check the air pressure going to the fuel nozzle. It should ~3.5#. You can adjust it by turning the adjusting screw in the other hole in the filter cover. That plug should have a hole in it.

Dec 29, 2010 | Reddy REDR40T Heater

1 Answer

When turning on My dyna pro 6500 heater. The fan will kick on for about 10sec then it will shut down and the red light will blink. How do I fix it


I have several of these in my shop. When they act up it is usually carbon deposits blocking the fire eye. This is a sensor that detects flame, if no flame is present it shuts down the whole heater. Remove the upper cover of the heater and attempt to start it, watch for 1- spark from the ignition sorce 2-fuel being sprayed from the atomizing nozzle 3-ignition of fuel. No spark bad spark plug or ignitor, no smell of fuel or small cloud of fuel, bad fuel filter, no fuel, bad fuel line, bad or plugged nozzle. There are several things that cause this but these are the three most common problems I encounter.

Dec 10, 2010 | Desa International R40 Utility Heater

1 Answer

Burner nozzle selection for Kerosene torpedo heater


Hello Teisco I would go with semi-solid style Spray pattern is not related to ignition.Universal is probably semi-sloid but stay away from that one.Spray pattern relates to running combustion noise,style can make all the differance.A.50 nozzle can&will clog easily ,replace it and dont touch/change anything else.See if thats it.Pump pressure should NOT have changed but is 100PSI.spark gap, stick near 3/8 or less.If it lights & sputters out dont change the gap .Is there water in the fuel?

Jul 26, 2010 | Heaters

2 Answers

Hear ignitor clicking but unit doesn't light


the clicking indicates a spark plug ignition. see if the spark is created across the spark plug gap. if it is then check the alignment of the plug in the nozzle spray pattern. if there isn't any fuel flow then all the clicking ain't gonna make any difference in the world!

Oct 13, 2009 | Reddy R115DT Oil Filled Utility Heater

1 Answer

Reddy Heater runs but will not ignite with bonnet attached.


First, let me say that the general principal of fuel delivery ***to the spark plug*** depends on several things.
  1. Proper air pressure at the nozzle (provided by the rotor/motor)
  2. Proper “fuel pattern” at the nozzle (provided by the rotor/motor/nozzle)
  3. Proper amount of ***air & fuel*** at the nozzle (provided by the rotor/motor/nozzle)
  4. Proper ***air flow (cfm) through the combustion chamber (provided by the fan blade/motor)
  5. Proper rpm’s of the motor, which affects all of the above.

On your heater the first step is to set the air pressure to specs. Instructions are on the www.reddyparts.com website. This pressure setting directly affects fuel delivery & fuel atomization

This nozzle rule will only apply if everything is correct as far as fuel delivery applies. The pump pressure must be correct- not almost correct. Set the pressure with a low-pressure gauge that registers12-15 psi max. A gauge with a higher scale just will not read close enough to satisfy the system. If the pressure is not correct, the above rule will not apply. Instructions for setting the pressure can be viewed at http://reddyparts.com/pressure.htm.

  • Next, if the fan is OK (correct & intact) look at the NOZZLE. DESA recommends annual replacement of the nozzle, which is a wear item. Naturally, annual usage varies, so, wear will depend on annual usage. A worn nozzle produces a cone shaped SPRAY rather than a cone shaped FOG. A spray drowns the spark, where a fog gets ignited, provided it contacts the spark. ALSO, the pattern from a worn nozzle can completely miss the spark (combustion??? Hardly!). When the top is lifted the change in airflow allows a false correction in the combustion chamber, allowing combustion, but when the top is replaced the flame is extinguished. A restricted nozzle or a restricted fuel filter will also distort the fuel pattern and create the same symptom. Also, like the fan blade, make sure that the correct nozzle is installed. Nozzles get swapped, too.


Dec 12, 2008 | Reddy Heaters

3 Answers

Won't fire up


Silvercliff- since you use the word “plug” I am assuming that you have a spark plug type heater, not the new technology HSI type (hot surface ignitor) that uses a glowbar and an onboard computer.

Reddy heaters are simple to troubleshoot, but you must understand how the system operates.

Since you state that the heater produces a fog at startup indicates that you are getting “some” fuel.

Obviously, the fuel is not igniting.

Now, you must determine if there is any spark. Is a good spark arcing across the electrodes on the plug? If not, is spark being produced by the Ignition Control unit (aka spark box, transformer) ? If not, is the Safety control (reset) sending electricity to the Ignition Control unit?

If there is a good strong spark at the plug, then you are having a fuel delivery problem, even though there is “some fuel”. Understand that the amount of fuel being delivered to the nozzle is DIRECTLY related to the air pump pressure. If the air pump pressure is not correct, then the fuel delivery is not correct. Setting the pump pressure is not difficult. Pump pressure is CRITICAL. Instructions for setting the air pump pressure can be found at www.reddyparts.com .

If the air pump pressure is correct, then check the following:
  1. Cracked air line preventing correct pressure at the nozzle.
  2. Cracked nozzle adapter preventing the fuel from being SUCKED from the tank.
  3. Clogged fuel filter.
  4. Restricted or worn nozzle. The fact that your heater is a spark plug type heater indicates that it has some age on it. DESA recommends annual replacement of the nozzle. Are you using the original nozzle? Worn nozzles produce a SPRAY. New nozzles produce a FOG. The nozzle produces a cone shaped fog. If the cone is missing (not hitting) the spark, for some reason, then there will be no ignition.
  5. Finally, and don’t laugh, is your fuel 100% kerosene or diesel? Water sinks to the bottom of the tank. The heater draws fuel from the bottom. If there is an inch of water on the bottom…….., well, water will not ignite.

I hope this helps.

Aug 28, 2008 | Reddy Heater-30-55,000 BTU Variable

2 Answers

Kerosene forced-air heater won't start


Rick---A couple of things to check. With the unit off and unplugged, remove the spark plug-(Note-there may be a little setscrew which you have to remove first)----Put the plug wire back on the plug and ground it against the side of the heator and start it just briefly to see if the plug fires----If it does, then again with the unit shut off, remove the nozzle which has a set screw holding it in. The nozzle has 2 rubber lines running to it and leave them on and then start the unit (Note, be aware that in this test and the plug test that when its plugged in, the fan runs, so keep the plug wire and the rubber lines away from the fan) With the nozzle removed, watch very closely to see if a mist comes out of the nozzle after you plug it in. If no mist comes out, then you probably have either an air or fuel problem.---With the spark plug test, if there is no spark at the plug, the easiest way is to install a new plug and if there is still no spark, then the ignitor is probably bad----------On the nozzle test, try taking off the 2 lines on the nozzle, one line goes to the fuel tank and the other line is the air line (take note which line goes where) first blow thru each connection on the nozzle to see if its plugged and if its not then blow thru the hose going to the tank and you should hear a bubbling noise in the tank--if not then, its plugged or the hose is split----------The other line is the air line and if you can't get anything on it, the filter may be very dirty----behind the filter, there should be a port for checking the air pressure when the unit is running----The unit I have runs on 3 psi pressure, BUT yours may run on a different setting--That psi setting may be stamped on the unit behind the filter---Hope this helps

Nov 10, 2007 | Heaters

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