Laars lite 2 heater direct ignition problem

That involves changing out the complete burner tray including the igniter/pilot assembly, burners and the gas valve. It runs deep into the cost of a new heater, (well over $1000, not installed).

check the silver line going to the pilot might be restricted with spider web if no spider web need new pilot generator

Gas valve is either not getting signal from thermosts or the gas valve coil is bad. Can you check for proper voltage to gas valve ?

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

This is probally your ignition wire is bad and not reading flame at the pilot or your pilot is bent or something so that when the pilot lights the flame isn't hitting the sensor probe at the pilot. When looking under the heater use a mirror so if you get roll out of the flame you don't get burned. Good luck and be careful.

No...do not add anything to those gaskets.

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

what burner where on the oven or the cooktop, if its the oven it may need new gas valve w\ thermocoupler

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