Question about Lite On Laars Lite 2 Heaters: 250,000BTU MV Heater

2 Answers


Electricity is flowing fine to the unit, gas is flowing fine, but the "hot surface ignitor" is not igniting.  This is a frequent problem I've had over the years, and seems to get worse as time goes by.  I've had it "repaired" a couple of times but technicians never would show me what they did.  It seems like a system that is prone to frequent failing.  Is there something I can do to fix it and then to maintain it so this no longer occurs, or is this new-fangled "hot surface ignitor" technology so sophisticated and complex that I'd be better off hiring a technician and/or replacing the faulty part?  Thanks - Tom in L.A.

Posted by on

  • 1 more comment 
  • tjbworkstati Feb 06, 2009

    Thanks, Guru - I'll give that a shot and let you know how it all goes.

  • madirap Mar 25, 2009

    I had the same problem. Got the HSI checked from the store everything was okay. The unit starts fine but no heat. The HSI does not heat.

    What could be the problem

  • nyjet Apr 01, 2009

    How do you perform a HSI test?



2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

How do you perform the hsi test on a 2005 ld400n

Posted on Apr 01, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,214 Answers

I think you could be buying you own HSI part and replace yourself. But I would suspect that the technicians are not being careful when the install the new ones, or someone is getting their hands on them.
But even at that, they are problematic. I am not sure if there are different grades of HSI's either, so that may be the problem too.
They are not that hard to replace. You just need to be sure that it is the as being the cause of the failure.

I would order new ones on the Net, and replace. Just be sure not to touch the HSI, PERIOD. Use only the wrapping that the HSI comes in to hold it, and only remove when all possibility of touching it has gone.

Let me know if you have any more questions. I'll be happy to reply. I somehwat got out of the business as HSI's were coming in, but I do know the right questions to ask, and how to figure out what's happening.

Posted on Jan 29, 2009


1 Suggested Answer

  • 2 Answers

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

a 6ya Repairman can help you resolve that 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 repair professionals here in the US.
click here to Talk to a Repairman (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Hi there. there is no spark to ignite the gas in oven.

You will need to replace the spark module if you don't hear any clicking, or there is no spark present when trying to ignite the gas.

To test the Spark Module:
When properly operating, the spark module repeatedly produces a spark at the ignitor accompanied by a sharp snapping sound.
  1. Turn off gas and power supply to unit.
  2. Check wiring diagram to verify all terminals and wire connections are correct and tight with no cuts in the wiring.
  3. Prepare to measure voltage on spark module from terminal L to N.
  4. Turn power supply back on.
  5. Turn top burner to LITE position.
  6. If no voltage is present on the meter, this will indicate the electrical circuit is interrupted before the spark module
  7. If voltage is present, then check ignitor.
  8. If ignitors are ok; then replace spark module.
To access the Spark Module:
  1. Turn off electrical power and gas to the range.
  2. Disconnect gas and power from unit.
  3. Remove screws securing top surface burners.
  4. Remove surface burner and disconnect spark ignitor wire from surface burner.
  5. Raise and remove maintop from unit.
  6. Remove screws securing spark module bracket.
  7. Disconnect wire terminals from spark module.
  8. Replace and reassemble in reverse order.

May 18, 2011 | Amana Ovens

1 Answer

Dryer starts hot surface ignitor comes on gas valve opens i get a flame 5 mins flame shuts off hot surface ignitor repeats and tries to ignite no flame after unit is off for 20 mins to 30 mins off unit...

Hi, If you are having problems with your gas dryer not heatingthe most common problem is that the ignitor goes bad. Even though it glowssometimes it is still not working properly. if you dryer is gas check out this gas no heat tip.... If you have an electric dryer, you can have many differentthings that can go wrong causing the dryer not to heat. check out this electric no heat tip...


Sep 17, 2010 | Kenmore 77632 Gas Dryer

1 Answer

FL 4 code Hot surface igniter problem on Jandy Lite 2 - FixYa

check the fuses from the red wires if blown replace if ok replace ignitor

Aug 27, 2010 | Jandy Lite 2 Natural Gas Pilot Light...

2 Answers

Ignitor lights up bright, but no ignition,no flame and I don't hear the gas turn on like I normally do. Top burners work fine.

Hello, welcome to fixya ! Based on your description I suspect you have a faulty bake ignitor. This may surprise you, or it may not. I think at first it surprises people when the hot surface ignitor glows but the oven won't lite. Since the ignitor "glows" one figures it would appear to be working, that would be wrong. These ignitor's serve 2 functions, 1) need to maintain a set value to open/activate the gas valve, typically around 3.5amps... & 2) ignite the fuel once said gas valve is open. A poor/faulty ignitor may glow & and even ignite the burner intermittently for moments at a time ( thus giving off some heat but never the set amount or not lite at all ) but yet not reach the needed value to open the gas valve/safety valve consistently nor adequately, hence the need to replace the ignitor. Try this and I'm certain you'll be up & running and as they say " cookin' with gas" ! I'd suggest you should refer to your specific model when ordering the part locally or on-line. The most common hot surface ignitor part is #12400035 and it will work in your Whirlpool too. Try places like,, etc. Thank's for visiting "fixya" for your stove inquiries. Please take a moment while here to rate the solution provided or let me know if you require further assistance and good luck. macmarkus :)

May 23, 2010 | Whirlpool AKZ159IX Oven

3 Answers

I have a Raypak 147CHL boiler used for our house's slab heating. Started up this season 2 weeks ago but 2 days ago went off. Now it won't restart. Tried turning off & restart several times but no...

Check to see if there is voltage going to the Hot Surface Ignitor when you first try to fire it up. If you have voltage but it fails to glow, the hot surface ignitor has failed and will need to be replaced.
Also ensure you have proper flow through your boiler......make sure you have water flowing through the boiler and, if there is a flow switch, check the voltage across the two terminals of the switch......check each to ground for voltage. If you have voltage, then check the voltage reading across the two terminals themselves, you should read 0 volts across the terminals (indicating the switch is closed).
Hot surface ignitors are "wear-n-tear" items and should be the first place to check.
I hope you find this information to be very helpful to you moving forward.
Please let us know if you need further help. :-)

May 18, 2010 | Heating & Cooling

1 Answer

FL 4 code Hot surface igniter problem on Jandy Lite 2

fl 4 bad ignitor or bad fuses if fuses ok replace ignitor

Apr 01, 2010 | Jandy Lite 2 Natural Gas Pilot Light...

2 Answers

Jandy Lite 2 LJ will not ignite

Depending on the exact model, it would have either a spark ignitor or a hot surface ingnitor. The HSI uses either 24 or 120 Volts, the spark only uses 24 V. Easiest way to check is to use a volt meter, disconnect the ignitor plug, use the volt meter leads to check voltage at the plug and have the boiler start its ignition cycle, if you have voltage during the cycle, the ignitor is bad. If you are unsure of checking for voltage, have a professional do it. You can be seriously hurt or electrocuted if you are not careful on 120V ignition systems.

Jul 24, 2009 | Jandy Lite 2 Natural Gas Pilot Light...

1 Answer

Janitrol furnace wont ignite

it is probably a bad hot surface ignitor

Jan 29, 2009 | Kitchen Appliances - Others

1 Answer

Having problem with Frigidair PLGF389CCB oven will not lite.

you may need a new gas valve....but i think you should replace the ignitor first. the gasvalve won't open unless the ignitor pulls a certain amp draw to keep it open, since yours is just opening when you hit it, and closing when you hit it again, i believe it is the ignitor

Jan 03, 2009 | Frigidaire PLCF489AC Dual Fuel (Electric...

Not finding what you are looking for?
Heating & Cooling Logo

340 people viewed this question

Ask a Question

Usually answered in minutes!

Top Lite On Heating & Cooling Experts

Paul Carew

Level 3 Expert

2823 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Lite On Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides