Hello All. When I turn on the Mastertemp 400 heater for my spa, the valves turn correctly, the pool pump runs, and the startup display on the heater shows briefly 888, 128, R13, and the service system light is on. That display quickly changes to the water temp, and the service heater light comes on. the blower does not start and there is no heat. Also, I notice water starts to leak from the two joints of the chlorinator, which is in front of the heater, as if there is a too much pressure. The filter goes up 10 psi while the spa is on. The jests to the spa work, just no heat. I backwashed the filter, and opened the heater box, no debris, rodents or visible damage. any Ideas ? I have been dealing with high PH this season, and we have hard water. Thanks.