My pentaire gas heater works. However, when it reaches the temp I set on the easy touch and heater instead of shutting off it will say 70 degrees, and the service button comes on. It appears to blow out colder air from the vent so I do think it stops heating. I don’t know if this is normal. I thought the heater would shut off when it reaches desired temp?This is a pic of the heater I have and it seems to be functioning fine. First year with this pool. Any help appreciated