I live in NJ.  I have a geothermal heat/ac unit with no conventional heat backup.

FHP model SX048-1, Pump HR003-1XXX-XXX

intermittent lockout problem, usually only occurred when large differntial between thermostat temp and house temp, only with heat

this solution typically worked:  pull thermostat remove battery to clear memory, reset breaker and reinstall battery and reinstall thermostat

system takes 10-15min to reset then works, has happened a couple times this summer, there is a specific sequence to resetting thermostat and breaker and I always forget and usually just try multiple methods, i.e., reset therm first, or turn breaker off, etc.

The breaker is never actually tripped

This is not working today,

any ideas

Is your filter clean and the condensate pan draining ok?
joe

I am still having problems with my compressor locking out. After my system runs for an extended period of time, the compressor will lockout and the auxillary will kick on. My technician has done the following things: Replaced the CXM board twice, cut JW3 - this was not done originally yielding a low water temp problem, installed a hard start kit on the unit, flushed the ground loops, replaced air filters, installed a toggle switch to disengage the desuperheater during extreme cold, recalibrated the refrigerant pressure temperature settings, check for high low pressure problems - there was none. What in the world is going wrong ?

did he check the EWT??

what type of ground loop do you have?

problem occur on heating, cooling or both......
your description makes your contractor sound incompetant. I don't know that to be true. can you write us a better description of the problem and when it seems to occur as well as loop type and what tests your contractor performed as well as no results. The trouble shooters check list might help organize your thoughts.
j