Raypak RP2100 Shutting off

[Watermom]

Any help for this poster?

[pilot-werx]

have you tested the water pressure switch and on/off switch for continuity? Check the thermostat for resistance? Have you put the thermostat all the way up to see if it will run longer? I have the older raypack (manual thermostat) and have had to replace the pressure switch a couple times...