I recently had issues with my Waterfurance open loop Geothermalsystem and the repair guy said the issue was my pump, not the system and he doesn't work on pumps. So I picked up a new water pressure switch and new meter gauge for the system . I turned off the power to the water pump, disconnected the wiring and removed the faulty water pressure switch. The stem pipe leading up to the sensor switch was completely clogged with sediment. I used a screw driver, was able to remove all the sediment until the water ran clear. I then reconnected everything and turned the power back on. A lever on the side of the pressure switch allows me to force the pump to go on. I turned it on until it reached 50 PSI and it switched off, when the pressure reached 30 PSI, where it was suppose to turn on, it didn't and the pressure gauge meter dropped to zero. After fooling around with it for awhile, i decided it must be more sediment in the lines I missed. I powered everything off, took the switch off and this time I removed the pipe stem and ensured it was completely cleaned out, I also removed several other fittings to ensure there was no more sediment, put everything back together, reconnected power, tested it again, same thing happened, just wasn't switching on when it reach 30 PSI pressure. Finally I turned the pressure adjustment screw a 1/2 of a turn and thankfully it started switching on at 30 PSI. I watched it several cycles til the geothermal compressor kicked it. I checked the system the next day, same issue the system compressor is in lockout cause the water isn't running. I adjusted the pressure switch screw some more, it kicked on at 32 PSI, watched it after i reset the geothermal system till the compressor kicked in, problem solved. Checked the system a day or 2 later, same issue, now the pressure is up to 35 PSI on, 55 PSI off. Reset, worked again, watched it for half an hour. I checked it again today, maybe 2 or 3 days since I last looked at it, same issue. I switched the pump on, reset the Geo system, it seemed to work fine again. OK, whats the frigging problem? Defective Home Depot pressure switch? Did sediment get into the switch causing intermittent failures? Is there an electronic version that more reliable? I can't be watching the damn thing or be checking it everyday, I need a reliable well pump. Any ideas? Also why does the pressure gauge read 30 PSI then 0? I would think the pressure would continue to drop till it reached zero, not just drop to zero when the pump doesn't turn on at 30 PSI.