Hi limit reset - Jandy Laars LX Pool Heater / 400,000 BTU / Natural Gas

Follow the wires for the contactor coil one of them is connected to a resetable hi limit, press the button on the hi limit to reset

HH is over heat.
If you have a manual Hi Limit Sensor try reset the sensor with the push button on the heater.
If you have an electric system unplug then reattach the hi limit sensor on the board.
If neither works it's likely the hi limit sensor has failed or another overheat event has damaged the spa.

Hi there!
Reset button of hi-limit switch will only pop-out when its sensing bulb sensed temperature higher tha 450F (trip temperature of hi-limit). Theramostat may be bad allowing oil to reach temp above 450F causing hi-limit to trip-off or hi-limit itself is bad tripping-off at temperature lower than 450F.
Check also the position of the sensing bulb of the hi-limit, it may be positioned touching the heat tube (for gas fryer) or heating element (for electric fryer) that's why it prematurely trips-off.
Regards.

When trouble light comes on, it indicates that the hi-limit is tripped (this happens when oil temperature exceeds 450 Fahrenheit). The red button is located at the upper back panel of the unit, give it a push to reset but if nothing happens after resetting the button, the hi-limit needs to be replaced. Also try to check if the thermostat is working, stuck thermostat's mechanical contact will cause the hi-limit to trip.

Reset switch (hi-limit reset button) is usually located at the back panel of the unit if it has a reset button design.If the hi-limit activates and does not have reset a button, you have to wait for the oil temperature to cool down and it will automatically reset.

hi limit is tripped, look for the red reset button and reset it.if the red light is still on after resetting, replace the hi limit device.

Hi,
Check the high limit switch and reset it... the latent heat in there trips the high limit...

The high limit is usually near the blower compartment and has a little red button in the center that you need to push back in to reset it...

heatman101

Hi Limits are a safety device, your only option is to replace bad hi limit with a new one. Do not try and repair or adjust a faulty one.
They are fairly in expensive just be sure to replace one with the correct bulb or probe length and diameter.
Bulb style here
or Probe style here.

Hello,

Sorry to hear you`ve had an ongoing issue like this. Can you tell me what the model number is of your oven ? Can you also maybe touch on what step`s have been taken in the past when this occur`s ?

Depending on the model and vintage of your oven, it likely has tripped the hi-limit thermostat. The good new`s is it is typically easy to reset as it is a manual reset type hi-limit as opposed to one time non-reset. Also this hi-limit is either located on side, back, or behind the grill between the oven door and control panel/fascia. Let`s hope for the later.

**Always shut off power to the unit before performing any service/repairs**

If it is indeed just a tripped hi-limit as I suspect, ( it is common after self clean cycles on many ranges/ovens, not just Thermador ) I have a few tip`s and suggestion`s after you`re up and running, but we`ll cross that bridge when we get there.

I`ll watch for your reply. Good luck.

macmarkus :)