Guide
Repair or Replace? How to Decide About Your HVAC System
A clear framework for deciding between repairing and replacing heating and cooling equipment, based on age, failure type, refrigerant, and repair history.
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Repair or replace is a judgement call, not a formula, but it becomes much easier once you look at four things honestly: the age of the equipment, what actually failed, what refrigerant it uses, and how many repairs it has already needed.
This article gives you the questions to ask. It does not include prices, because a real number depends on your equipment, your home, and what the diagnosis finds.
Age of the equipment
Most residential systems in Central Texas give twelve to fifteen years of service, sometimes more with consistent maintenance and less when they run hard without it. Our long cooling season means local equipment accumulates run hours faster than the same unit would in a milder climate.
Under about ten years, repair usually wins. Past fifteen, a significant repair is often money spent on a system that will ask for more soon.
What failed
Not all failures carry the same weight.
- Capacitor, contactor, igniter, flame sensor, thermostat: small, routine, repair without hesitation.
- Blower or condenser fan motor: moderate, usually still worth repairing on a mid-life system.
- Evaporator coil leak: significant, and worth comparing against replacement on older equipment.
- Compressor or heat exchanger failure: major. On a system past twelve years this usually points to replacement.
Refrigerant type
If the data plate says R-22, that refrigerant is no longer produced, which makes leak repairs expensive and increasingly impractical. A system on R-22 with a refrigerant leak is usually a replacement conversation.
Newer systems use R-410A or one of the current low-GWP refrigerants, which are widely available and do not change the math on their own.
Repair history and comfort
Two service calls in two seasons is a pattern, not bad luck. So is a system that has never actually kept the house comfortable, or one that leaves the air damp. Replacement is the point at which sizing and airflow problems can finally be corrected, and that is often worth more to a household than the efficiency rating.
Questions to ask whoever quotes the work
- What exactly failed, and what did you measure to determine that?
- If I make this repair, what else on this system is near the end of its life?
- How did you arrive at the size for the replacement you are proposing?
- What duct or return corrections does this system need regardless of which path I choose?
- What is the warranty on the part, the equipment, and your labor?
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