Air conditioner not working
Warm air from the vents, ice on the lines, or an outdoor unit that will not start. Here is what to check first, and what we do when we get there.
Set it to COOL, a few degrees below room temperature, with the fan on AUTO. Replace the batteries if the screen is dim.
A clogged filter is the number one reason an AC freezes up and stops cooling. Replace it if you cannot see light through it.
Your AC usually has two breakers, one for the indoor fan and one for the outdoor unit, plus a shutoff box on the wall by the condenser. Make sure none of them is off.
With the system calling for cooling, the big fan on top should be spinning. Clear away leaves, grass clippings and anything stacked within two feet of it.
If you see ice on the copper lines or the indoor coil, turn cooling off and run the fan only until it melts. Then call us.
Hear buzzing from the outdoor unit with the fan not turning? Turn the system off at the thermostat. A compressor trying to start against a failed capacitor can overheat and damage itself.
We explain what we found in plain language and give you the price before any work starts. If your system is near the end of its life we will tell you that too, and give you a free estimate on a replacement so you can compare.
Already know you want a new system? See air conditioning repair and installation for what goes into a good install, compare swamp and evaporative coolers, or look at a heat pump that cools in summer and heats in winter. And a spring AC inspection catches most of these problems before the first hot day.
| Service | Price | Details |
|---|---|---|
| AC Repair | $89 trip/diagnostic fee | $89 trip/diagnostic fee that will be waived if you choose to go ahead with the repair. The repair price will depend on the specific service needed. |
Prices as posted on our online request form. Request any of these online or call 303-464-7000.
October 2026
Great air conditioning process and execution. Showed up, assessed, and priced. No “cooling associate” follow-up needed like 2 other companies; this company cut to the chase. They gave the most competitive price and Charlie and Ian were thorough and worked hard on my install. Highly recommend.
October 2026
Today’s service was the yearly furnace inspection. The technicians arrived within the quoted time window, and were friendly, informative, and knowledgeable. The pricing was competitive. This is the second time that I’ve used Aspen Creek, the first time was for air conditioner repair. I’ve been completely satisfied so far, and plan on continue using them for my HVAC needs.
October 2026
Our AC unit broke overnight. We found Aspen Creek through reviews online. Dan from Aspen Creek was out the next morning within hours of our call. He had us fixed super quickly and was just the nicest guy. He is super knowledgeable and I highly recommend his company.
September 2026
⭐⭐⭐⭐⭐ Aspen Creek Heating & Air has been my go-to HVAC company for quite a while, and they continue to earn my business every time I need them. They are quick to respond, dependable, and professional. One thing I especially appreciate is their communication—they keep me updated throughout the process, so I’m never left wondering what is happening or when something will be completed. When there’s a problem, I want a company that responds quickly, communicates clearly, shows up when they say they will, and gets the job done right. Aspen Creek Heating & Air has consistently done exactly that for me. It’s difficult to find service companies you can truly rely on, and once you find one, you stick with them. Aspen Creek Heating & Air is that company for me. I highly recommend them to anyone looking for a reliable, responsive, and professional heating and air conditioning company. ⭐⭐⭐⭐⭐ #captjimandadela #capjimed
July 2026
Aspen Creek has to be the most professional Company I’ve deal dealt with in a long time. Our repairman, Sam was on time, very professional, explained what was wrong and not wrong with our air condition unit. Sam was not the typical high-pressure salesman. I highly recommend Aspen Creek if you are having problems with your air conditioner or your heating.
July 2026
Great communication, fast scheduling, reasonable prices (given the cost of HVAC stuff). Helped with a repair on my AC unit and got me in next day after a Sunday call with no rush scheduling cost. Thanks!
July 2026
My AC seemed to not be running efficiently lately so I made an appointment with Aspen Creek to check it out. Sam came yesterday morning and did an inspection. The coolant was running low so he topped it off and I'm thrilled to say my AC is no longer running constantly and is keeping my house cooler even with the thermostat set slightly higher! This will save me money in energy costs over our increasingly hotter summers! This is the first time I've used Aspen Creek and was really impressed with Sam's professionalism and knowledge. I will definitely be using Aspen Creek for all my heating and cooling needs moving forward!
July 2026
On possibly the hottest day of the summer around 5PM, our AC quit working. I had read several positive reviews about Aspen Creek Heating and Air on another social media site and decided to contact them. The phone was immediately answered by Dani (sp?). She was very professional and scheduled a service technician for the next morning. Sam showed up as scheduled, was professional, and didn't try to upsell us. He diagnosed the problem within 15 minutes. The charge was reasonable. We are so glad we found Aspen Creek Heating and Air and will definitely use them in the future for any heating or cooling needs. We highly recommend them.
July 2026
We had Dan and Toby install a mini-split in our bedroom because our central air wasn't keeping the second floor room cool enough during the summer. The whole office was great to work with and they did an excellent job with communication and the install. There were a lot of twists and turns getting the lines routed down to the compressor/condenser and they did a great job of keeping it as clean and tucked away as possible. I highly recommend Aspen Creek.
The most common causes are a dirty filter, a dirty outdoor coil, low refrigerant from a leak, a failed capacitor that keeps the outdoor fan or compressor from starting, or a frozen indoor coil. If the outdoor unit is silent while the indoor fan runs, the capacitor or contactor is a strong suspect.
Turn the cooling off and run the fan alone so the ice melts, which can take a few hours. Check the filter. Ice usually means poor airflow or low refrigerant. If it freezes again after the filter is changed, call us.
AC repair starts with an $89 trip and diagnostic fee, and we waive it if you go ahead with the repair. The repair price depends on what we find, and we tell you before we do any work.
Yes, we do refrigerant recharges. But refrigerant does not get used up. If it is low there is a leak, and we will tell you where it is and whether fixing it makes more sense than topping it off.
Yes. We sell, service, start up and winterize evaporative coolers.
Family owned since 2010, serving Lafayette, Broomfield, Westminster, Arvada, Erie, Louisville, Superior, Thornton, Boulder and North Denver.
Monday to Friday, 7am to 5pm · Send us a message
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