Geothermal Heat Pump Replacement Questions

If the indoor unit fails repeatedly or can no longer keep the home comfortable, replacement is usually the better path. The decision starts with a loop pressure test and a check of the indoor components, compressor, heat exchanger, circulating pump, to identify exactly where the failure is.

Often yes. If the loop passes a pressure test and the flow rate is within the manufacturer’s range, the buried high-density polyethylene pipe can support a new indoor unit. Reusing the loop avoids excavation and keeps the project significantly smaller.

A unit with a slow refrigerant leak or a failing compressor will short-cycle, raising energy use and putting extra strain on the circulating pump. Delaying through a Denver winter risks a full heating failure when outdoor temperatures are at their lowest.

The federal residential geothermal tax credit does not apply to systems placed in service after the end of 2025. Colorado utility rebate programs may still apply to qualifying replacement equipment, the installer checks current programs before the estimate is issued.

In most cases yes, but a sizing check at replacement time confirms the new unit’s airflow requirements match the existing duct layout. If the ductwork is undersized for the new unit’s output, that is flagged in the written estimate before work begins.

The installer runs an altitude-adjusted load calculation based on the home’s square footage, insulation, and window area. Denver’s elevation affects heating capacity, so matching the nameplate of the old unit is not a reliable method.