Failing geo heatpump?

[JRiley_73]

Hello,
I have a 6 year old Geothermal heatpump, with a closed circuit loop. It has worked well so far.
Recently, it has had 2 problems:
1. the pump starts when called for heat, runs about 10 mins, then shuts off, (called for temp not reached), then restarts after about 5 minutes.
2. The warm air is only about 10 deg warmer than the intake (intake 70, output 81), whereas when properly functioning it is about 92-93 .



Service person will be here early next week, but for my own knowledge any suggestions as to what this could be?

Thanks

[beenthere]

Best not to speculate.
Since that can give a preconceived notion that it should be something other then the tech finds. And make you doubt the tech on site.

[wahoo]

I'm sure your technician will recommend this system be serviced at least once a year by a trained technician, if he does not then find a service company who sells a good pre-paid annual or twice a year service agreement and stay with them. Geothermal is expensive equipment to replace and it's always far cheaper to keep it up than replace it.

[TwincamDave]

My SWAG would be it's low on charge and shutting down on low pressure. But this is just a guess without being able to look at it.