AC repair in St. George

What people actually call about

Described the way homeowners describe them, not the way a manual does.

• "It's running but blowing warm." The fan works and the compressor does not, or the system has lost refrigerant, or the outdoor coil is too dirty to dump heat. Common in July, and common on units sitting downwind of open ground.
• "It worked yesterday, now nothing." Often electrical — a failed capacitor or contactor. These are heat-stressed parts, and a long run of design-day afternoons is exactly what finishes them off.
• "There's ice on the pipe." Usually airflow. A loaded filter or a dirty indoor coil drops airflow far enough that the coil freezes, and a frozen coil blows warm air. Turn the system off, leave the fan running to thaw it, and change the filter before anyone comes out.
• "It keeps tripping the breaker." Stop resetting it and get it looked at. A breaker that trips repeatedly is reporting a real fault.
• "It runs constantly and never gets there." On a 109°F design day some of that is physics. If it happens at 95°F, it is not.
• "Water on the floor by the furnace." Usually a blocked condensate drain.

Two things to try before booking

Neither requires tools and both fix a real share of calls.

1. Change the filter. Filters load faster here than the packaging assumes.
2. Look at the outdoor unit. If the fins are packed with dust, cottonwood or landscaping debris, the system cannot reject heat. Shut the power off at the disconnect before touching anything.

If neither changes anything, book it. Refrigerant, electrical and compressor work are licensed trades and are not homeowner jobs.

Repair or replace

We do not quote either one — the contractor who sees the equipment does that. But the factors that decide it are worth knowing before the conversation: the age of the system against its expected service life, whether the failure is a wear part or the compressor, whether the refrigerant it uses is still readily available, and how hard the system has been working to hold temperature over the last few summers. A system that has been struggling to keep up on design days was probably undersized or is losing capacity, and repairing it returns you to a system that was already not enough.

If replacement comes up, read the AC installation page first. Sizing is where that money is won or lost.

Why equipment here gets dirty faster

This is the northeastern edge of the Mojave. The air carries fine mineral dust most of the year, spring wind events push a lot more of it, and a condenser sitting outside is pulling all of it across the coil every time it runs. On top of that, sustained construction on the Washington Fields side means graded dirt upwind of a lot of houses.

Two practical consequences. First, a dirty outdoor coil cannot reject heat, so the system runs longer and hotter for the same cooling — on a 109°F design day that is the difference between keeping up and not. Second, filters load faster here than the interval printed on the box assumes, and a loaded filter starves airflow across the indoor coil, which is a common route to a frozen coil and a system that blows warm.

Check the filter monthly through the cooling season rather than trusting the number on the packaging, and follow the equipment manufacturer's guidance for your specific system. If you can hold it up to a light and not see light through it, it is past due.

How to check the contractor's licence yourself

Utah licenses heating and cooling contractors through the Department of Commerce, Division of Professional Licensing. The classification to look for is H100 — HVAC. DOPL's current contractor classification list no longer carries the older S350 HVAC specialty; new HVAC applications moved to H100, with the updated application requirements taking effect 20 April 2026.

Under the current requirements an H100 applicant has to complete a 25-hour pre-licensure course, pass the H100 written trade exam, and document 4,000 hours of qualified HVAC employment within the past five years using W-2s, K-1s or tax returns. DOPL also sets general liability insurance minimums for the classification, and a fingerprint-based background check requirement begins 1 January 2027.

You do not have to take anyone's word for it, including ours. Utah publishes a free licence lookup: secure.utah.gov/llv. Search the business name before work starts.