Pool heater will only switch to SPA function. The pool light does not illuminate. I only have a pool. Last year, same problem and I needed to replace the fuse. This year that did not help. The fan will kick on for when I select SPA, but the burners do not ignite but I get e few clivking sounds. Ater a minute or two of the fan running stops running and I get an AGS error message (automatic gas shutoff)

Pool & Spa - Teledyne Laars - Laars Lite 2 Pool Heater 250,000 Btu / Propane Gas