Question about Desa International RH125AT Utility Heater

1 Answer

All Pro 200t Will not ignite

This is a 200t Multi fuel forced air heater.

My basic question is, should the ignitor stay on, HOT, for all three cycles to start. As soon as the motor starts the ignitor goes out and no start.

This is what I do know.

1. New ignitor
2. Photocell good
3. Pump pressure at 5.6 psi
4. Running K1
5. Voltage at heater is fine, not an outlet specific problem.

Could it be the controller? Seem odd that the heater cycles 3 times yet the ignitor goes out after the pump starts. Shouldn't the ignitor stay on until the photocell detects flame?

Thanks, John

Posted by on

  • 1 more comment 
  • jcs4968 Dec 18, 2008

    Tbugger, Thanks for the response. I will try to give some more information. I like lists. It is easier for technical reading so bear with me.



    1. all fuel and air lines are good. all fittings are clamped.

    2. the pump delivers fuel to the nozzle. it will flood itself after unsuccessfull starts.

    3. filters are all clean. air and fuel.

    4. my confusion is that as soon as the pump starts the ignitor dims. It is almost black, or off, however you would like to term it, efore the fan is at speed.

    5. cycle question, Here is the procedure it follows, automatically.



    1.

  • jcs4968 Dec 18, 2008

    Sorry-wrong key.



    1. ignitor powers up to red color, fan starts, ignitor goes out, fan powers up to speed and then shuts off.



    2. Fan powers up again and then stops.



    3. fan powers up once more and then stops.



    4. at this point I get a flame error on the control panel.



    I have to reset the heater to get it to cycle again, power off or unplug. Oh it does have clean fuel and has run recently. when we get it to start we do not turn it off.



    This cycle happens over a time period of approx 10-12 seconds. automatically, definately being contolled by the ignition control board. It just seems that the ignitor is not on long enough to give the fuel an opportunity to light.



    I am stumped.

  • jcs4968 Dec 23, 2008

    I will try the thermostat bypass, can't hurt. I do not have thexact model number as the heater is not local to me. This weekend I will get more detailed information and see if the bypass helps.

×

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 232 Answers

John- the ignitor does not stay on for the duration of the running time. It only stays on for the first 5 seconds. This is long enough for the flame to ignite and perpetuate itself, assuming the fuel delivery system is up-to-par. The photocell monitors the flame color and if the flame becomes off-color then the photocell tells the control board to shut the unit down. Naturally, too rich or too lean affects flame color.

Now, I'm confused by your description "the heater cycles 3 times". Tell me more.

I'm glad to see that you checked the pump pressure. Have you used soapy water to check for air leaks all the way to the nozzle? A leak in the airline, fuel line, or a crack in the nozzle adapter will cause no fuel delivery, or reduced fuel delivery as well as reduced atomization of the fuel - all of which can cause a lack of combustion. A restricted fuel filter will cause starvation.

Eliminate all possibilities of a fuel delivery problem before you start blaming electronics because there is not much way to test the board or the photocell successfully without DESA's diagnostic tool. Unfortunately, replacement of the componants is cheaper than the tool.

Posted on Dec 18, 2008

  • Jerry Magee
    Jerry Magee Dec 18, 2008

    John- Let me start by saying that your model as stated "200T" is not a model number. It's simply is a series of 200k heaters that have a thermostat. There are at least 7 actual models of the 200T and most take common parts, but , in order to get the right stuff you must identify the true model of your heater. By knowing the model a manual can be accessed. Examples; R200BT, RM200T, RE200T, etc.



    As you already know, the cycling is not natural. And, if I understand your description correctly, the ignitor starts to glow, the the unit cycles, preventing a full glow, & preventing combustion.



    I've never run into this situation, myself, but if I was working on the heater my first suspect would be the thermostat. It is easy to troubleshoot simply by bypassing it.



    Next, would be a loose electrical connection "somewhere".



    Next would be to replace the board & photocell.



    Tbugger

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Runs with cover off but reset switch kicks off when cover is installed


It may be over heating check vent ports verify no obstructions reduicing air flow.

Mar 10, 2015 | Reddy Kerosene Heater with Thermostat:...

1 Answer

I hava an All Pro 65,000 BTU heater. It was working fine a week ago. The igniter glows, fuel mists but doesn't light off then shuts down. Ideas?


I am sure you have confirmed that the fuel is fresh and good, no water in it, etc.--
It is kerosene, not #2 Diesel fuel, right?

And the shutting down is good, if the flame does NOT ignite--- :-)
So we have to figure out why the fuel is not getting hot enough to ignite?


Question-- is the oil spray passing close enough to the ignitor?
And this unit does NOT use SPARK to ignite?, correct? --
for most of these heaters have spark ignition.. I am learning all the time, too!

How about checking the fuel pressure. and the air -- is it correct?
Check with your manual how to check and adjust.

After testing these tings, let us know what you learned

Mack B

Jan 15, 2011 | All-Pro Kerosene Garage Shop Heaters - All...

1 Answer

I have a All-Pro 115,000 btu multi fuel heater. When first plugged in fan runs, fuel sprays out the nozzle but heater won't fire. Any suggestions?


You probably have already checked this but is the ignitor trying to fire or not working at all ? Just curious. Thank you

Dec 17, 2010 | All-Pro Kerosene Garage Shop Heaters - All...

1 Answer

I have changed the ignitor, the air and fuel filters, put in fresh fuel, had the photocell and the control board checked. The heater will go through the cycles, ignitor ignites , sprays fuel, fan blows...


Have you checked the air pressure it should be around 6lbs. to do this is in the back on the filter cover remove plug that is on the left side insert a pressure guage turn on heater and look at guage you can adjust air pressure by turning the slotted screw that is to the right of the guage. If you cant get 6lbs of pressure then check the rotor assy. and check to see if you have any cracks any where on the filter cover.

Mar 21, 2010 | Desa International Reddy Heater 200,000...

1 Answer

Igniter brun out


first two things that come to mind are wrong fuel, and ignitor too close to heart of the flame. also could be wrong ignitor, (too long)..

Jan 12, 2010 | All-Pro Kerosene Garage Shop Heaters - All...

1 Answer

Water Heater Burner Won't Stay Lit


have you tryed the pressures switch try jumping it out and see if it lights up

Jan 01, 2010 | Reliance 43614 Heater

1 Answer

I have a 75,000 btu all-pro forced air contruction kerosene heater. Lately its been running for a bit before ignition and then a lot of smoke and flames. After it settles down it heats fine. Today it...


Just in time for a spring cleanup! Sparkplug----- fuel filter-- 2--air filters vanes in the pump assembly which you can purchase at your local lawnmower repair shop ,or they can order them....

Dec 02, 2009 | All-Pro Forced Air Kerosene Space Heater...

1 Answer

All Pro K75 will not ignite. Spark igniter does


most kerosene heaters are basically the same - reddy heat, dynaglow, desatech are all the same. there's a small air compressor built into the axially mounted fan that points forward. the air pressure needed for fuel is 3-5 psi not less, not more! the air feeds through a side inlet to the fuel nozzle where it creates a vacuum venturi to **** fuel from the tank and propels it through a fan nozzle. the aerrated fuel hits the hot surface or spark and ignites. as long as there is heat and air the heater should function.

Oct 22, 2009 | All-Pro Forced Air Kerosene Space Heater...

Not finding what you are looking for?
Desa International RH125AT Utility Heater Logo

2,358 people viewed this question

Ask a Question

Usually answered in minutes!

Top Desa International Heating & Cooling Experts

Paul Carew

Level 3 Expert

3408 Answers

Steve Allison
Steve Allison

Level 3 Expert

5569 Answers

Gil Shultz

Level 3 Expert

3382 Answers

Are you a Desa International Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...