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

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My Laars 2 lite pool heater will not ignite, I have the same problem every year for the first ignition. The pilot is lit. I removed the filter to make sure it is not the pressure.

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You might need to bleed the line to get fuel to the heater core. If there is a bubble in the line it will prevent the heater from working. Usually, there is a bleeder valve on the heater unit -- unscrew this and let some of the fuel drain out (into a container) and give it another shot. It should light right up after bleeding the line. If the fuel that you took out of the bleeder valve looks clean, you can then put it back in the fuel tank and it should be fine.
If this is a natural gas heater, there will be no bleeder valve -- you should have it looked at by a professional repair person. Natural gas is very dangerous and should only be repaired by a qualified professional to avoid serious injury or death.

Posted on May 27, 2011

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I have a 1998 250000 btu laars pool heater propane just hooked it up for first time got pilot to light can't get burner to turn on any solutions.

Posted on May 23, 2012

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1 Answer

We have a laars lite 2 pool heater , the pilot is lit but the unit will not fire up


With these pool heaters, there are a couple of things that you can try before you call a pro. First, make sure that your gas valve knob is turned to the on position. Secondly, you could have air in your gas line. Cycle the ignition sequence until all air is out of the line. It could also be that your gas valve is malfunctioning and needs to be replaced.

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Do you replace the thermopile or check the milivolts?
Check the Pressure gas
You need replace all of them terminals and check again the milivolts at the gas valve

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check your ignition status. if you have a pilot ,make sure its lit. if you have a glo ignitor, make sure its glowing when you turn on the heater. sometimes it will glow but it might be hot enough to open the gas valve. also be sure to check your gas supply and make sure you are getting fuel to the unit.your heater will not turn on if your pool filter mode is enabled.

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More than likely the tempature control is defective, since you effectively bypassed that connection. I found a manual for your unit which shows different types of ignition. I'm not even sure if the millivolt system is covered in this manual. Here's the sight
http://shop.solardirect.com/pdf/pool-heaters/gas-pool-heaters/jandy-lite2manual.pdf

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It could be that the Igniter has gone bad. Or it cold be a number of other items, like the gas valve itself. If the heater has a display panel on it, is there an error code showing? If there is, go to your Owner's Manual and find out what the code is for the heater.

If you do not have a manual, you can find one online at the following link:

http://www.inyopools.com/owners_manual/jandy_heaters_lite2.pdf

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usually indicates a flame sensing problem. remove sensor and clean with steel wool .

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millivolt readings are independent of pump and filter.just make sure heater is in off position for accurate read

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Most heaters do not require power for the pilot to remain lit. Is there power at he unit? If it worked yesterday and not today has anyone turned it off at the circuit breaker? If you have power turn the gas valve off for 10 minuets and then relight to see if it needed a reset.

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