HVAC Services
AC Repair in Thornton, CO With Same-Day and Emergency Service
Warm air on a hot day gets a same-day answer from NATE-certified technicians who diagnose the cause on site and give you the price before any work starts, so you are not guessing whether this is a small part or a bigger problem.
Your AC Is Running but the House Is Not Getting Cool
It is 95 degrees, the system has been running nonstop, and the air at the vents is barely cool. That usually points to refrigerant, airflow, or a failed electrical component, and each one has a different fix and a different price.
A technician tests the system at your home, tells you what failed and why, and quotes the repair before touching a wrench. You decide from there. We have been doing this for north Denver homeowners since 2012.
Emergency AC Repair During a Colorado Heat Stretch
When a stretch of upper-90s weather hits and the cooling quits, waiting a week is not a real option. Call us and we work to get a technician to you the same day, including after hours and on weekends.
Calls are answered by our own team out of Thornton, Denver, and Brighton, not a routing service. If your house has infants, older adults, or anyone with a heat-sensitive health condition, say so when you call and we move you up.
The AC Symptoms We Get Called For Most
Find what your system is doing below. Each of these has a specific cause a technician can confirm on site.
AC Running but Not Blowing Cold Air
Low refrigerant from a leak, a dirty condenser coil, or a failed compressor capacitor all show up the same way at the vent. We measure refrigerant charge and temperature split to tell them apart instead of just adding refrigerant and leaving.
Some Rooms Cool and Others Stay Warm
Uneven cooling is usually duct leakage, a closed or crushed branch run, or a blower that is not moving enough air. We check static pressure and airflow room by room, then correct the cause rather than turning the thermostat lower.
Outdoor Unit Hums but the Fan Does Not Turn
That is the classic sign of a failed run capacitor or a seized condenser fan motor. Shut the system off at the thermostat if you hear it, because running the compressor without condenser airflow is how a repair becomes a replacement.
Ice on the Refrigerant Line or Indoor Coil
A frozen coil means airflow is restricted or refrigerant is low. Turn the cooling off and leave the fan on so the ice can thaw, then call us. Running an iced system pushes liquid refrigerant back to the compressor.
The System Trips the Breaker
Repeated breaker trips point to a shorted compressor winding, a failing motor drawing high amps, or a wiring fault. Do not keep resetting it. We test amp draw and the electrical circuit before restarting anything.
The Thermostat Will Not Start the System
A dead thermostat, a tripped float switch on a plugged condensate drain, or a blown low-voltage fuse will all leave the system unresponsive. These are among the least expensive AC repairs, and we check them before we look at anything larger.
Small Issues That Turn Into Bigger Repairs
Cooling problems rarely stay the same size. A few common ones get expensive when they run untouched:
- Warm air and reduced cooling put the compressor under strain it was not built to carry.
- Weak airflow wears out the blower motor and the coil ahead of schedule.
- An icing system sends liquid refrigerant into the compressor.
- Treating it as "just the thermostat" delays finding what actually failed.
Most of these are found in spring before the first hot week. Our
seasonal AC maintenance and tune-ups check refrigerant charge, capacitors, coil condition, and the condensate drain while the system is still off, which is when they cost the least to correct.
What to Check While You Wait for a Technician
Step 1: Set the Thermostat to Cool and the Fan to On
Confirm cooling mode, drop the setpoint a few degrees, and switch the fan to On. If the indoor blower runs but the outdoor unit stays quiet, that narrows the problem before we arrive.
Step 2: Check the Breakers
Look for a tripped breaker at the panel for both the furnace or air handler and the outdoor condenser. Reset it once. If it trips again, leave it off and tell us.
Step 3: Look at the Air Filter
A filter packed with dust restricts airflow enough to stop cooling and freeze a coil. If it is gray and matted, replace it.
Step 4: Shut the System Off if the Coil Is Iced
Turn cooling off, leave the fan running, and give it a few hours to thaw. Running an iced system while you wait is what turns a repair into compressor damage.
Step 5: Note Any Unusual Sounds
Clicking, buzzing, humming, or rattling each point somewhere different. Telling us what you heard shortens the diagnosis.
What AC Repair Costs in Colorado
You get a real number before work begins, not after. These are the ranges most north Denver homeowners land in, and the exact figure comes after diagnosis and gets your approval first.
- Diagnostic visit: $89 to $149, applied toward the repair if you have us do the work.
- Capacitor or contactor replacement: $150 to $450.
- Condenser fan motor or blower motor: $500 to $1,200 depending on the part and the system.
- Refrigerant leak repair with recharge: $400 to $1,600 depending on where the leak is and the refrigerant type.
Systems using R-22 cost more to recharge because the refrigerant is no longer produced, which is one reason a leak on an older unit is worth a repair-versus-replace conversation. Larger repairs can be spread out through
Wells Fargo Home Projects financing.
Should You Repair or Replace a 15-Year-Old AC?
A repair is usually the right call on a system under about 12 years with a single failed part and no refrigerant leak. Past 15 years, on R-22, or with a compressor failure, the repair often costs a large share of what a new system does and buys you only a season or two.
We give you both numbers. You see the repair price and the
air conditioning installation price for a properly sized replacement, along with any Xcel Energy rebates that apply, and you pick. Estimates are free either way.
AC Repair in Thornton, CO and Broomfield, CO
Our trucks run out of three offices, at 12168 Hudson Court in Thornton, 8551 Faraday Street in Denver, and 14850 Hanover Street in Brighton, so most of the north metro is a short drive. We handle AC repair in Thornton and AC repair in Broomfield along with Northglenn, Brighton, Commerce City, Denver, Federal Heights, and Erie.
That matters on a cooling call because we know the housing stock. The 1970s ranches in Northglenn and Federal Heights with undersized returns, the newer Erie and Broomfield builds with two-stage systems and zoning, and the Denver bungalows running condensers in tight side yards each fail in their own way.
The crew behind the work: NATE-certified technicians and Master Mechanical credentials, Trane Comfort Specialist status, and owner Jason Van Orden with more than 20 years in the trade. Locally owned and operated since 2012, and free estimates on every call.
A 5-Star Average Across 280 Google Reviews
You can also see the systems we have installed and serviced in these neighborhoods on our recent projects page.
Questions Homeowners Ask Before an AC Repair Call
Who does emergency AC repair in Thornton, CO?
VO Heating and Cooling handles emergency and after-hours AC repair across Thornton and the surrounding north Denver metro. Call 720-687-3822 and we work to get a technician out the same day, including evenings and weekends during a heat stretch. Calls are answered by our own team out of Thornton, Denver, and Brighton.
Why is my AC running but not blowing cold air?
The three usual causes are low refrigerant from a leak, restricted airflow from a clogged filter or dirty coil, and a failed capacitor keeping the compressor from starting. A technician measures refrigerant charge and the temperature difference between return and supply air to tell them apart. Guessing here is how homeowners end up paying for refrigerant twice.
How much does AC repair cost in Colorado?
A diagnostic visit generally runs $89 to $149, a capacitor or contactor replacement $150 to $450, a blower or condenser fan motor $500 to $1,200, and a refrigerant leak repair with recharge $400 to $1,600. Systems still running R-22 cost more because that refrigerant is no longer produced. You get the exact price after diagnosis and approve it before any work starts.
Can someone fix my AC today near Broomfield?
Often yes. Broomfield is inside our regular service area and same-day cooling calls are what our summer schedule is built around. Call early in the day for the best chance at an afternoon slot.
Is my AC freezing up because of low refrigerant?
Low refrigerant is one cause, and restricted airflow is the other, most often a clogged filter, a dirty evaporator coil, or a weak blower. Both drop coil temperature below freezing and ice it over. Turn cooling off and leave the fan on so the coil can thaw, then have it diagnosed before running it again.
Should I repair or replace a 15-year-old air conditioner?
If the failure is a single part and the system holds refrigerant, a repair is often still worth it. If the compressor is failing, the unit runs R-22, or repairs are stacking up, replacement usually costs less over the next few years. We price both so you can compare them side by side.
Do you repair all AC brands?
Get Your Cooling Back Without the Wait
Warm air, weak airflow, or a system that will not start all get the same response: a NATE-certified technician on site, a clear diagnosis, and the price before the work. Free estimates, financing when a replacement is the better call, and a local crew already close by.
