Why is my AC running but not cooling?

Common causes include low refrigerant, dirty condenser coils, or a failing compressor. Our technician will diagnose and quote the fix on the spot.

How often should AC filters be changed?

Every 1–3 months depending on filter type and household conditions. A dirty filter is the #1 cause of AC inefficiency and early failure.

Is it worth repairing an older AC unit?

If the unit is over 12–15 years old or requires a major component replacement, a new high-efficiency system often pays for itself within a few years.

Longmont, CO · AC

AC Repair & Installation in Longmont — Stay Cool Without Getting Burned on Price

Beat the Colorado Heat with JT's HVAC Team. Serving Longmont and all of Northern Colorado.

(970) 818-1613 Book Online

Licensed & Insured

24/7 Emergency

Flat-Rate Pricing

4.8-Star Rated

Longmont summers are warm with intense afternoon sun and regular thunderstorms. When your AC goes down, the temperature inside your home can climb past 85 degrees in a matter of hours. Pets, kids, elderly family members — heat inside a closed home is a real health concern, not just a comfort issue.

JT Plumbing Heating & Air provides AC repair and installation in Longmont with flat-rate pricing. No premium charges because it's 95 degrees and you're desperate. The same fair price, every time.

AC Problems We Repair

Not Cooling

The most common call. Causes range from low refrigerant to failed compressors to dirty condenser coils. We diagnose the actual cause, not just the symptom.

Short Cycling

Your AC turns on and off frequently without completing a full cooling cycle. This wastes energy and wears components. Common causes include oversized systems, thermostat issues, or refrigerant problems.

Strange Noises

Grinding, squealing, banging, or clicking noises indicate mechanical problems that will get worse if ignored.

Uneven Cooling

Some rooms cold, others warm. This can stem from ductwork issues, an undersized system, or airflow restrictions.

High Energy Bills

A sudden spike often indicates your AC is working harder than it should — dirty coils, low refrigerant, or failing components reduce efficiency dramatically.

AC Replacement: When It's Time

AC systems typically last 12-15 years. If yours is in that range and facing a major repair — compressor failure, refrigerant leak in an R-22 system, or repeated breakdowns — replacement is usually the better investment. Modern systems are significantly more efficient, and many qualify for utility rebates.

We offer Good, Better, and Best options so you can choose based on your budget and efficiency goals. Higher SEER-rated systems cost more upfront but deliver lower monthly bills for the life of the unit.

AC Maintenance for Longmont Homes

A spring AC tune-up catches problems before the heat hits. We check refrigerant levels, clean coils, inspect electrical connections, test capacitors, and verify thermostat operation. This prevents most mid-summer failures and keeps your system running at peak efficiency. Our membership plans include this tune-up annually.