geothermal pumps arent running

[Ray G]

hi i have an ultrazone Gmp3000 control on a Trane ground source heat pump (geothermal) system. the two pumps arent running, and the fan just blows air. is there anything i should try before dragging the service guys out?

[Erik W.]

Can you tell me all the lights that are lit on the zone panel when the system is just continuously running the fan?

Erik Wnoroski
EWC Controls, Inc.
385 State Route 33
Englishtown, NJ 07726
800-446-3110 ext 483