40 year old WaterFurnace geothermal heat pump Heat pump not running Auxiliary heat not working Repaired multiple loose wires inside the unit Getting 24V to the thermostat but nothing out of it despite displaying an active call for heat Replaced thermostat 15kw heater has one bad heat strip, so only 10kw functional One relay is bad, as well Moved good relay from the failed heat strip to the other good heat strip Verified correct auxiliary heat operation Heat pump functioning properly now, too