Posted By 88koller56 on 15 May 2012 12:36 PM
I recently purchased a home with a geothermal heat pump (ap049) model an there is no thermostat. I purchased a 5/2 day programmable one and gave it my best shot at wiring it based on how the wires are hooked up to the system itself. When I put the batteries in I lost all my power to the system. I don't have any of my little flashing/steady lights anymore. I have 240v going into the coil and zero coming out. I assume I have to replace the coil, however I need to know how to correctly wire the thermostat before I replace it. Any and all help would be outstanding as it is getting hot here in va bch. Lol.
You would be better off posting to the geo or radiant forums as that's where the experts hang out. Probably due to crossed wires you have blown a low voltage fuse either in the 'stat of in the control board of the pump.