The problem is not the heater. When was the last time that you cleaned the pool filter? Low or no water flow - no heat. Low flow = dirty filter or plugged pump or skimmer baskets.
Use the link below to look at a Laars manual to see if one is included.
Try this link www.jandy.com Ken
Check that you are getting voltage from the thermocouple. You should see about 600 millivolts.
I cannot find a current listing for Teledyne Laars. As far as I can tell, Teledyne and Laars separated, Laars joined up with Waterpik and then got reorganized under Jandy. www.jandy.com now has the Laars Lite2 line of pool heaters with the LG model almost identical to the Teledyne Laars LLG. You can access the manual at http://www.jandy.com/pdfs/H02359-.pdf . Jandy also has a parts list for older discontinued models.
go to their website and support and download it
You might want to try Jandy.com k
Here is the file http://i.poolproducts.com/pdf/XL3_manual.pdf
Try google Jandy.com
You can find every part you need for your boiler at gasboilerspareparts.com
Pool heaters are needed to help keep the pool water at a comfortable temperature. A Teledyne laars series 2 model esg pool manual is usually available with the manufacture.
it makes sure the heater is shut down BEFORE the pump does. It is very important if the heater runs without the pump running the water will boil in the lines and burn out the heater. I know this because my electrician didnt wire mine correctly and that's what happened to me. BYE BYE 2,500 heater
Use the manual provided with the heater. Each heater has somewhat different controls etc. If everything is already hooked up you may just have to turn a switch or two and turn up the thermostat.
Write or inquire thru that web site for a manual to be sent to you. k
Spa not getting to temp? Could be a dirty filter. Could be a high limit switch or other component.
Manual says 'Automatic Gas Shutoff' heater probably is not igniting. Should call your pool man. Manual recommends not to light manually. Please don't try (if you like your eyebrows) :-)
The thermostat for the heater is on the heater. Remote controls for the heater or other pool equipment is not an automatic option. You must contact a swimming pool professional skilled at installing remote controls for your pool equipment in a location which is convenient for you in your home. k
Lighting this heater appears to have a number of warning messages associated with it. It is typically best to go to the source for such things, so see the link below for the manual PDF file. Look at page 29.
Probably a bad sensor. Have a professional diagnose the problem. It can be very dangerous for untrained to work on gas appliances.
Depends on location and heat-up time. Taking into consideration wind and heating demand, I would probably go with a Laars 325 or 400 BTU heater. If high wind is a problem, a Laars 400 LT/LX could be the answer. The larger the heater, the faster the heat up time, and fewer days of waiting for target heating temperatures to occur. And fewer days of heat loss. HM Louisiana You also have to take into consideration the gas supply line size. This dictates and can limit the size of heater. k
As the water begins to flow within the system, the components inside the heater compartment ( the pressure switch)senses that flow and if your heater is calling for heat it will fire. When that water ceases to flow those same sensors tell the heater to stop firing. Built in safety devices. Ken
Have the thermocouple checked or spillage from down draft and make sure there is free air for proper combustion
If the leak is in the copper fins/heat exchanger : replace the exchanger, gaskets etc Not a job for someone who is not familiar with pool heater construction and service. If the leak is at the inlet or outlet you may have to remove those fittings and replace woth new ones.
Assuming the heater is running properly, is sized correctly the filter is clean it could possibly mean that the run time for the pump is not sufficient. How long is the filter/pump running? The water returning to the pool may not feel "hot" to the touch and shouldn't. Ken
When was the last time the filter was cleaned? Have all the components in the heater system been checked for proper values? Does the heater sound as if it wants to fire up? Does it have a pilot light or electronic ignition? Have the orifices been checked for bugs or spiders? Ken