During the compilation of the shoppers checklist we discussed a trouble shooter's checklist.
I am inspired to kick one off now in no small part due to simultaneous posts that complain about electric bills without any supporting data to confirm or exclude trouble with their systems. I'll throw in some thoughts and as before encourage anyone's input:

If you are having trouble with your heat pump (or think you are) and wish to ask for advice here, you will be asked some or all of the following. In a brief desription of your problems, your ability to provide this information greatly increases your odds of success;

1) Where you live
2) Heat loss/gain calculations for your home
3) Brand, size (model), age and type of heat pump
4) Type of loop field (open/closed/vertical/horizontal) size and design parameters
5) Average cost/Kwh of electricity and consumption
6) Entering and leaving air temperatures (EAT, LAT) measured immediately upstream and downstream of the heatpump
7) Entering and leaving water temperatures (EWT, LWT) measured at the geo system
8) Percent of load to be covered by geo and balance point
9) Installer's assessment of your systems operation.
10) Projected operating costs, actual operating cost and previous heating and cooling costs

Items 2, 3, 4, 5, 8 and 10 are all easily found operating cost projection reports such as Climatemaster's Geodesign.
Most signs of trouble are when actual experience varies greatly from these projections.

Air temperatures may be taken with an inexpensive probe type thermometer. Water temperatures may be taken with the same instrument if ports are available where water lines go into heat pump or by taping the thermometer to the entering and leaving water lines and insulating it from surrounding air.

It is also helpful to state your question briefly and in short paragraphs. Lengthy blogs make useful information difficult to ferret out.

Finally, YOU MUST read responses and answer questions.

Good Luck,
Joe