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My Laars LX 250 is leaking from one (1) of the High Limit Switches. It is the High Limit Switch that is inserted vertical into the housing.I tried to install a new Retainer Plate and it still leaked. I am confused. Do you mount the rubber bumper to the retainer plate and then screw it to the housing or is there another way to assemble that rubber bumper?

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Nop that is the only way but why is leaking are u install tablets on the skimmer?

Posted on Aug 25, 2009


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My jandy lxi say's fault high limit there a test or bypass i can try

Yes you can jump past the limit switches one at a time. That will tell you which one is bad. Then you will need to replace it.

Sep 26, 2010 | Jandy Laars LX Pool Heater / 400,000 BTU /...

1 Answer

My jandy LT heater leaks water out of the HI-LIMIT 150 degree plug/switch, behind that there is two screws. Both screws are tight ? what do I look for next ? clueless .. Thanks Dave

I have the 250000BTU version but I believe they are the same in this regard.

It is far more likely to be simply that the low pressure detection copper line sprung a leak or is loose and perhaps dripping onto the limit switches. In and around the same area as the 2 hi-limit plugs is a small flexible copper tube (like for a refrigerator water line). Check that connection for a leak. The other end of that pipe is in the wire chase above the front panel. If you need directions on how to open either panels just ask.

Aug 09, 2010 | Jandy Laars LX Pool Heater / 400,000 BTU /...

1 Answer

Noticed water leaking a lot from bottom of unit. Looked like a pretty good leak. Unit is 9 years old. Leaks when Pump is running

More than likely the heat exchanger. Has the pH and Total Alkalinity been low? Check the Pressure/Temp relief valve, thermostat probe, high limit switches, etc. first though...

Jun 12, 2010 | Jandy Laars LX Pool Heater / 400,000 BTU /...

1 Answer

Where is the hi temp limit switch located?

where is the high temp limit switch located on my laars 44000 pool heater

Jun 02, 2010 | Jandy Laars LX Pool Heater / 400,000 BTU /...

1 Answer

My High Limit light comes on, along with service light.

Check your high limit switches. These can be found in the header. There will be two, and they are right next to eachother. You may pull them out and they may look like they are corroded or have gritty stuff on them. If that is the case, they will need to be replaced. However, this is usually an indication that the stud sensors in the header are corroded and the new sensors switches will again go bad. Unfortunately, the stud sensors are brass little posts, that were poorly made on some jandy heaters. They are available on a part, but near impossible to replace. So, it means you will likely need to replace the entire header or keep on replacing the high limit switches. HTH

May 30, 2010 | Jandy Laars LX Pool Heater / 400,000 BTU /...

1 Answer

Laars LX400 Air Flo SW Error

is fan coming on if not bad fan motor also check pressure switch if 24 volts both sides that's ok make sure air flow switch hose is ok

Sep 09, 2009 | Teledyne Laars Laars Lx Pool Heater /...

2 Answers

Laars LX400P pool heater Hi Limit Switch light is on? ???Fix?

This indicator normally means that your water temperature in the pool heater exceeds the internal limit. The corrosion should not be causing this problem. Since the high temperatures can be dangerous, you will probably have to contact a pool professional to service the machine.

May 31, 2009 | Teledyne Laars Laars Lx Pool Heater /...

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