Air Conditioning Repair in Aurora Hills

Ice on the refrigerant line and water where water should not be are the two calls that define cooling season in Aurora Hills. Both start at the evaporator coil inside the furnace cabinet, and both come down to the same short list: not enough air moving across that coil, or not enough refrigerant inside it. Aurora Hills sits in Arapahoe County at 5,515 feet, 108 feet above central Aurora. MoJo Home Services answers at 720-807-4050.

Why is my Aurora Hills air conditioner covered in ice?

Ice means the coil surface dropped below freezing, which happens when the refrigerant inside runs colder than the air passing over it can offset. Two roads lead there. Restricted airflow — a loaded filter, a blocked or undersized return, a dirty evaporator, a blower on too low a speed tap. Or a charge low enough that the remaining refrigerant boils at a lower pressure and a lower temperature. Switch cooling off, leave the fan running to thaw the coil, and do not restart until someone has measured. Running an iced system sends liquid refrigerant back to a compressor built to pump vapor.

Why is water dripping out of the furnace cabinet?

The evaporator makes condensate even in dry Colorado air, and it has to leave through a trapped drain. Three things stop it. A clogged primary line. A trap that has dried out and lost its seal, so the blower pushes air through the opening water needs. Or a secondary pan that filled quietly because its float switch was never wired. When a coil ices and then thaws, the water arriving at once overwhelms a partly blocked line, which is why the ice call and the water call in Aurora Hills are so often the same call on the same day, reported by the homeowner in whichever order the symptoms appeared.

How does Aurora Hills' dry air change what normal looks like?

Almost all the work here is sensible cooling rather than dehumidification, so the drop across the coil reads higher than humid-climate references say it should — roughly 20 to 25°F instead of 16 to 20°F. A technician who sees 22°F at an Aurora Hills register and calls it overcooling is reading a chart written for a different climate. It also means an iced coil here is essentially never a humidity story. It is airflow or charge, and at 5,515 feet, where air runs about 15.2% thinner than at sea level, the airflow side has less room to spare than the tables allow.

What gets measured on an Aurora Hills coil call?

Static pressure ahead of and behind the coil. Filter differential, measured rather than assumed. Blower tap and delivered airflow against a target near 472 actual CFM per ton. Evaporator entering and leaving air temperatures. Superheat and subcooling. Drain line flow, trap condition, and float switch operation. And the coil face itself: a coil that has iced repeatedly carries bent fins and packed debris that no charge adjustment can undo. If any of that turns into equipment replacement rather than repair, it becomes permitted work, and Aurora Hills falls under Arapahoe County for that paperwork.

Does a frozen coil ruin the compressor?

It can, and the damage accumulates rather than arriving all at once. Liquid refrigerant returning down the suction line washes oil off the compressor bearings and, because liquid does not compress, hammers the valves. One thaw-and-restart cycle rarely kills a compressor. A summer of them in an Aurora Hills home tends to show up later as a compressor that will not start against pressure, or one drawing locked-rotor current on every call. That is why we ask homeowners to leave the system off rather than keep cycling it while waiting on a visit.

The rest of the Aurora corridor

Same trucks, same routes. Aurora sits 108 feet below Aurora Hills at 5,407 feet, Aurora Highlands sits 66 feet above it at 5,581 feet, and Murphy Creek lies east on the same corridor. The elevation spread across those four is modest; the equipment ages are not, and that is what actually changes the diagnosis.

Where else we work

Nearby and on the same schedule: AC repair in Aurora, AC repair in Aurora Highlands, AC repair in Murphy Creek.

For the other half of the system, furnace repair in Aurora Hills.

Wider view: AC repair, or everything in Aurora Hills.