Laars Lite 2 Model LD Pool Heater won't start. When turning it on I used to here a a couple of noises, like a tick, tick then it would ignite. I don't here those sounds anymore. Gas is on water flow seems normal. Tried replacing the pressure switch.

SOURCE: Won't lite, checked water flow and gas both good

could be the pressure switch.

SOURCE: Laars Teledyne Pool heater flames on for 2 seconds, shuts off

You have no flame rectification.....LLD series heaters check for a signal through the flame to ground; if the module does not detect this signal, it go through two more trials for ignition and then lock out the module. There should be a flame rod and it may need cleaning. I use steel wool.

SOURCE: I have a Laars Lite 2 400,000 btu pool heater. It

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

SOURCE: Convert Laars lite model lg125n to LP gas

i dont have a solution, but i would like to do the exact opposite. I would like to convert a lg125 from lp to natural gas. have you learned anything?

SOURCE: how to test an ignition assembly board for ld/125

this may tell me you dont know if the ignition control is not working. see the owner manual at jandy.com