Why is my AC running but not cooling my house?
Common causes are a dirty filter, a frozen coil, low refrigerant, or a failed part. Check the filter and thermostat first. If air is still warm, turn the system off and contact a provider.
A broken AC is stressful. Sun at altitude is strong, and the air is dry. A house can heat up fast when the cooling quits. You need to know what is wrong, what it may cost, and who can help.
Salesboots Heating & Air is a referral service. We do not repair air conditioners. We help you understand your options, such as repair or replace. Then we connect you with independent providers in our network who serve the Thornton area. You ask questions. You get a quote in writing. You choose. No pressure, and no obligation.
AC Stopped Cooling? Start Here
Stay calm. Most AC trouble has a simple first check. Some problems need a pro. Here is how to tell the difference.
Check the Easy Things First
Look at your thermostat. Make sure it says "cool" and the set temperature is below the room temperature. Swap in fresh batteries if the screen is blank.
Next, check your breaker panel. A tripped breaker can shut off the AC. Flip it off, then on, one time only. If it trips again, stop. Something is wrong.
Last, look at your air filter. A clogged filter blocks airflow. That can make the system freeze up or shut down.
Stop If You See Danger Signs
Turn the system off at the thermostat if you smell burning. Do the same if you hear loud grinding or see water pooling near the unit. Running a damaged system can turn a small fix into a big one.
If you smell gas, leave the house and contact your gas company or emergency services. Do not use the AC.
Emergency AC Repair: When to Move Fast
Some problems cannot wait. Heat is risky for babies, older adults, pets, and anyone with a health condition. If your home is getting too hot, call a provider soon. Many providers can respond quickly, but availability varies.
Request a callback to check provider availability in your area. Ask if they handle emergency AC repair. Not every provider does.
Signs Your AC Needs Repair
Small signs often come before a full breakdown. Spot them early and the fix may be smaller.
Warm Air From the Vents
The fan runs, but the air feels warm. This can point to low refrigerant (the fluid that carries heat out of your home), a bad part, or a dirty coil.
Weak Airflow
Air comes out, but only a little. Causes include a clogged filter, a blocked duct (the tube that carries air through your home), or a failing blower fan.
Strange Noises or Smells
Buzzing, squealing, and clanking are not normal. A musty smell can mean moisture. A burning smell can mean an electrical issue.
Ice on the Unit or Lines
Frost on the pipes or the indoor coil means airflow or refrigerant is off. Turn the AC off and let the ice melt before anyone looks at it.
Short Cycling and High Bills
Short cycling means the AC turns on and off in quick bursts. A bill that climbs for no clear reason is another clue. Both mean the system is working too hard.
What Happens During a Repair Visit
Knowing the steps helps you feel in control.
- The provider asks what you have seen and heard.
- They check the thermostat, filter, and power.
- They inspect the outdoor unit, the indoor coil, and the fan.
- They test pressures and electrical parts.
- They explain the problem and your options.
Ask before you agree. Get the quote in writing before any work begins. Ask what is included. Ask what could change the price.
Common AC Repairs
Smaller Fixes
These include a new capacitor (a part that helps motors start), a contactor (an electric switch), a thermostat swap, or a drain line cleaning. Many are quick jobs.
Mid-Size Fixes
Examples are a new fan motor, a refrigerant leak repair, or a coil cleaning. These take more time and cost more.
Major Fixes
A failed compressor (the pump at the heart of the system) or a leaking coil is a big job. This is where the repair-or-replace question gets real.
Climate Matters Here
Dry air and strong sun make your AC work hard. Dust and pollen can clog coils and filters. Hail can bend the fins on the outdoor unit. After a storm, ask a provider to look it over. Some policies may cover sudden damage, so check your policy. Providers can often help document damage for a claim.
Repair or Replace?
This choice is about the whole picture. Think about age, repair cost, and how often it breaks.
- Repair may make sense if the system is fairly new and the fix is small.
- Replacing may make sense if the system is old, needs repeated fixes, or uses an older type of refrigerant that is harder to find.
A common rule: if a repair costs close to half the price of a new system, compare both. Ask the provider to quote both choices in writing.
Hire With Confidence
Questions to Ask the Provider
- Are you licensed to work in this state?
- Do you carry insurance?
- Is the quote in writing, with parts and labor listed?
- Is there a warranty on parts and labor?
- Who will come to my home, and when?
A good answer is clear and short. It names the problem and the price. It does not rush you.
Red Flags
- Pressure to decide on the spot.
- A price that changes with no reason.
- Cash only, with no paperwork.
- No license or insurance details when you ask.
- A claim that you must replace everything with no test results.
Quote in Writing, Then Decide
Take your time with the quote. Compare it to another if you can. Good providers expect questions. When you are ready, call or request an estimate. You stay in charge the whole way.
What's Included
Problem Check
A provider looks at the thermostat, power, fan, coil, and refrigerant to find the real cause.
Clear Options
You hear what is wrong and what choices you have, in plain words.
Written Quote
Parts and labor are listed on paper before any work starts on your system.
Repair or Replace Advice
If the system is worn out, the provider can explain when replacing makes more sense.
What AC Repair Can Cost
Prices vary by job, home, and the part needed. These are typical U.S. ranges only. Your quote may be higher or lower. Always get a written quote before you agree to any work.
| Repair item | Typical range | Notes |
|---|---|---|
| Diagnostic visit | $75 – $200 | Often applied to the repair if you go ahead |
| Capacitor or contactor | $150 – $450 | Common, smaller electrical fix |
| Thermostat replacement | $100 – $350 | Smart models cost more |
| Condensate drain cleaning | $100 – $300 | Stops water leaks and shutoffs |
| Fan motor replacement | $400 – $900 | Depends on motor type and access |
| Refrigerant leak repair and recharge | $250 – $1,500 | Depends on leak location and refrigerant type |
How It Works
Tell Us What Happened
Request a callback or use the request form. Share the symptoms, the age of your system, and your location.
Get Matched With Providers
We connect you with an independent provider in our network who serves your area.
Review the Quote
Ask your questions. Get the price and the plan in writing before you agree.
Choose and Schedule
Pick the option that fits. The provider does the work and sets the timing.
Why Call Salesboots Heating & Air
Plain Answers
We explain trade terms in simple words so you know what a provider is telling you before you decide.
Options First
You see repair and replace choices side by side, with no push toward either one.
Local Providers
Independent providers in our network know how dry air, sun, and hail affect local systems.
No Obligation
Ask questions and request an estimate. You choose whether to move forward.
Other Services
Need home ac repair in Thornton?
Have a heating or cooling problem in the Thornton area? Ask for a callback or send a quick request. A local provider can follow up with next steps. No obligation.
No obligationFAQ
Home AC Repair FAQ
How much does home AC repair cost?
Many repairs fall between about $150 and $1,500 in the U.S., based on the part and labor. Costs vary by job. Ask for a written quote that lists parts and labor.
Should I repair or replace my air conditioner?
Look at the system's age, the repair price, and how often it breaks. If a repair costs near half of a new system, compare both. Ask the provider for both quotes.
Contact Us
Request a callback
Have a heating or cooling problem in the Thornton area? Ask for a callback or send a quick request. A local provider can follow up with next steps. No obligation.
No obligation