AC Repair or Replace? How Dallas Homeowners Can Decide

By the Cool Tech team · Air Conditioning

It's the question every Dallas homeowner eventually faces, usually in the middle of August: sink more money into the old system, or invest in a new one? There's no universal answer, but there is honest math. Here's how we walk our own customers through the decision.

Start with the age of the system

A well-maintained central AC in North Texas typically lasts 12 to 15 years — our cooling season runs seven months and regularly tops 100°F, so systems here work harder than the national average.

• Under 10 years old: repair is almost always the right call, especially if the unit is still under manufacturer warranty.
• 10 to 15 years: it depends on the repair. A failed capacitor? Fix it. A failed compressor? Time to run the numbers.
• Over 15 years: even a modest repair is often money spent on borrowed time.

The $5,000 rule of thumb

A quick gut check used across the industry: multiply the repair cost by the system's age in years. If the result is over 5,000, replacement usually wins. A $600 repair on an 8-year-old unit (4,800) is reasonable; the same repair on a 12-year-old unit (7,200) is a warning sign.

The R-22 refrigerant problem

If your system was installed before 2010, it may run on R-22 refrigerant, which the EPA phased out of production in 2020. Remaining supplies are recycled and expensive, so a simple refrigerant leak on an R-22 system can turn into one of the costliest repairs on the menu. For most R-22 systems, a major repair is the moment to replace instead.

What a new system buys you in Texas

Modern systems are dramatically more efficient than what was standard 15 years ago. Moving from an older 10-SEER unit to a modern high-efficiency system can cut summer cooling costs substantially — and in a Dallas summer, cooling is most of your electric bill. Add better humidity control, quieter operation, and a fresh 10-year parts warranty, and replacement often costs less over five years than keeping an old unit limping along.

Signs it's time to replace, not repair

• Second major repair in two years
• Electric bills creeping up each summer with no change in usage
• The system runs constantly on 100° days and still can't hold temperature
• Uneven cooling, humidity problems, or excessive noise
• It uses R-22 refrigerant and has a leak

Get both numbers before you decide

Any honest contractor should be willing to quote the repair and the replacement, and explain the trade-off without pressure. That's how we operate — our technicians aren't paid on commission, so you get straight numbers and an honest recommendation either way.