Heat Pump Repair in Franklin, IN

Heat pumps move heat rather than generate it, which makes them highly efficient in the moderate temperature ranges Franklin sees during spring and fall. The challenge in Johnson County is winter: when temperatures drop into the teens or single digits during the coldest stretches of December through February, a standard air-source heat pump loses capacity and efficiency, and the gas backup strip or furnace has to carry more of the load.

Heat pumps in the newer trail-connected subdivisions around Franklin's perimeter are typically installed as dual-fuel systems, pairing the heat pump with a CenterPoint Energy gas furnace backup. These dual-fuel setups are efficient when they run as designed, but a failure in the reversing valve or refrigerant charge can leave the system relying entirely on the gas backup, running up heating bills and stressing equipment that is not designed for full-time operation.

Heat pump failures present differently depending on whether the system is stuck in heating mode, cooling mode, or not moving air at all. Common fault areas include:

• Reversing valve stuck in one mode or failing to shift on a call for the other
• Low refrigerant from a coil or line set leak affecting both heating and cooling capacity
• Defrost board failure causing excessive ice buildup on the outdoor coil
• Capacitor or contactor failure preventing the compressor from starting
• Auxiliary heat lockout issues in dual-fuel systems paired with a gas furnace
• Thermostat or control board errors preventing mode switching

A failed reversing valve on a unit that is otherwise in good condition is worth repairing. A compressor failure on an older unit is closer to the line where replacement makes more financial sense. We present both options with full pricing when the call is genuinely close, so you are not guessing at the right answer.

If replacement is the better path, cold-climate heat pump technology has improved significantly. See our Heat Pump Installation page for information on modern systems and available Duke Energy Smart Saver incentives.

Why is my heat pump blowing cold air in heating mode?

Several things cause this: the reversing valve may be stuck in cooling mode, the refrigerant charge may be low enough to cut heating capacity significantly, or the outdoor coil may be iced over and not defrosting properly. In dual-fuel systems, the gas backup may also have a separate issue keeping it from engaging. A technician needs to run through the diagnostic sequence to identify which failure is driving the symptom.

Is it normal for ice to form on the outdoor unit in winter?

Light frost on the outdoor coil is normal and the defrost cycle handles it automatically. Thick ice that covers the entire coil and does not clear is a problem, usually pointing to a failed defrost board or sensor, restricted airflow, or a refrigerant issue. A fully iced coil cannot exchange heat and will eventually damage the compressor if left running.

Does a heat pump work well in Franklin's coldest winters?

Older standard heat pumps lose efficiency and capacity as temperatures fall below freezing, which is why most Franklin installations pair a heat pump with a gas backup. Newer cold-climate heat pumps have a much lower effective range and can handle more of the heating load without switching to backup even during the coldest Johnson County nights.

My dual-fuel system seems to be running the gas backup constantly. Is that a heat pump problem?

It can be. If the heat pump portion has a refrigerant leak, compressor issue, or reversing valve problem, it may not be providing any useful heating output, leaving the furnace to run at full load. The thermostat's auxiliary heat logic may also be misconfigured, triggering gas backup at temperatures where the heat pump should handle the load on its own.