Air Conditioner Repair Across Aurora

Aurora is the largest population we serve on this list — 359,407 residents, Adams County, 5,407 feet — and with that size comes every equipment vintage still in service. That is why the repair-or-replace question surfaces here more than anywhere else we work: what refrigerant a system holds usually settles the answer before anything else gets weighed. MoJo Home Services is family-owned, has run this metro since 2009, and answers at 720-807-4050.

How can I tell whether my Aurora AC is losing refrigerant?

An air conditioner is a sealed system. It does not consume refrigerant, so a low charge means a leak somewhere. The tells are cooling that has faded across seasons rather than stopping suddenly, frost forming where the suction line enters the cabinet, longer run times paired with a shrinking temperature split, and oil residue at flare fittings or on the outdoor service valves. Confirming it means measuring subcooling against the manufacturer's target for that model, then locating the leak by nitrogen pressure test, electronic detection, or dye. Topping a system off and driving away is not a repair.

Can an older Aurora system still be recharged with R-22?

Only from reclaimed stock. United States production and import of R-22 ended in 2020, so every pound still moving has been recovered from other equipment, and the supply thins each season. Aurora's housing spans decades, which means R-22 machines are still cooling plenty of homes among those 359,407 residents. When a system that old leaks at the evaporator coil or through a line set buried in a slab, the arithmetic shifts: you are pouring recovered refrigerant into a machine already at the end of its service life.

When does replacement beat repair on an Aurora system?

Four gates, taken in order. Is the failed component the compressor or the evaporator coil rather than an external part? Does the system hold R-22? Is the outdoor unit mismatched to the indoor coil, which caps performance no matter what goes in? Has the same equipment needed repairs in consecutive seasons? Two or more yes answers and replacement is the honest recommendation. A single yes and repair generally still wins. Worth knowing: new residential equipment moved to R-454B under the AIM Act phasedown in 2025, so a condenser-only swap on an existing R-410A system is a narrower option than it used to be.

Does 5,407 feet change how an Aurora system gets charged?

It changes the airflow the charge is judged against. Manufacturer superheat and subcooling tables are built on standard sea-level air, and Aurora air is roughly 14.9% lighter, so the blower has to deliver about 470 actual CFM per ton to move the mass those tables assume. Read the chart literally without correcting airflow and a technician will add refrigerant to a system that was never short. The same thin air puts Aurora's gas furnaces 13.6% below nameplate heating output, which is why so many here were installed a size up — and their blowers are what your cooling runs on.

What does a full Aurora diagnostic cover?

Static pressure across the air handler against the blower's rated maximum, delivered airflow, and the return-to-supply split, which in Aurora's dry air should read closer to 20 to 25°F than the 16 to 20°F humid-climate references list. Then capacitance against the stamp, contactor condition, compressor and fan amp draws, condenser approach over ambient, superheat and subcooling, and the condensate drain with its float switch. We write down what each reads, because on a repair-or-replace decision the numbers are the argument.

Aurora is not one elevation. Where does your address sit?

The city name covers ground that varies by nearly 200 feet. Central Aurora sits at 5,407 feet, Aurora Hills at 5,515, and Aurora Highlands at 5,581 — a 174-foot spread carrying a derate range of 13.6% to 14.3%. Murphy Creek sits further east on the same routes. That is a modest spread and we will not pretend otherwise: what genuinely varies across Aurora is the age of the equipment, not the barometer.

Other Aurora-area pages

The crews that cover Aurora also run AC repair in Aurora Hills, AC repair in Aurora Highlands, AC repair in Murphy Creek.

If it is the other system acting up instead, start at furnace repair in Aurora.

See AC repair for the service itself, or everything in Aurora for everything we do there.