Why is my AC running but not cooling the house?
Common causes include a clogged filter, a dirty outdoor coil, low refrigerant, or a failed capacitor. Check the filter and thermostat first. If air is still warm, a provider can diagnose the cause.
AC, furnace and replacement help in Grafton
Request an estimate from a local provider
A broken air conditioner is stressful, especially if it has never happened to you before. The air feels warm, the house gets sticky, and you do not know who to trust. Leadercute Heating & Air is a referral service. We explain what is likely going on, in plain words, so you can talk to a provider with confidence.
The repair itself is done by independent HVAC providers in our network, not by Leadercute Heating & Air. You can request an estimate, compare what they say, and decide at your own pace. After the work is finished, we also share small habits that help your system last through the next hot, humid summer in the Grafton area. Fix it, then keep it.
The house felt fine yesterday. Today the vents blow warm air and you are not sure what to do. Take a breath. Most AC problems come from a short list of causes. Think of a flashlight that stops working: you check the batteries before you buy a new one. Your AC deserves the same patient first look.
These take about five minutes and need no tools:
If none of these helps, you have still gathered useful facts to share with a provider.
Ice on the coil means air or refrigerant is not moving the way it should. Running the system anyway is like driving on a flat tire. It can turn a small fix into a costly one. Set the thermostat to 'off' and the fan to 'on' so the ice can melt. Then ask a provider to find out why it formed.
Heat and humidity are hard on babies, older adults, and pets. If your home is unsafe, treat it as emergency AC repair. Request a callback to check provider availability, and know that many providers can respond quickly. Meanwhile, close blinds, run fans, drink water, and rest in the coolest spot. A full basement often stays several degrees cooler than upstairs.
An AC usually gives hints before it stops. Like a cough before a cold, they are easy to ignore. Watch for these:
One sign may be minor. Two or three together mean it is time for a visit.
Your AC does two jobs. It cools the air and it pulls moisture out of it. Picture a sponge that never gets wrung out: in thick summer air, the system works nonstop. Add severe thunderstorms and hail, and the outdoor unit can take hits from power surges or dented fins. Those stresses explain many summer breakdowns.
Here are the parts that fail most often. Knowing them helps the estimate make sense.
A capacitor is like the push that gets a swing moving. When it weakens, the fan or compressor hums but will not start. These are small, common parts, and they often fail in heat.
Refrigerant carries heat out of your home. It is not used up like gas in a car. If levels are low, there is a leak. A provider should find it, not just top it off.
As the coil removes moisture, water drains away. A blocked drain line is like a clogged kitchen sink. It can back up, trip a safety switch, and shut the system down.
A tired fan motor moves less air. A faulty thermostat sends wrong signals. Both can feel like a big failure but are often modest repairs.
If this is your first time, here is the usual flow. The provider asks when the trouble began and what you noticed. They inspect the indoor and outdoor units, test electrical parts, and measure airflow and temperature. Then they explain what they found and give a written quote. Nothing should start until you agree. A good visit feels like a doctor's checkup: questions, tests, a clear answer.
A clear estimate lists parts, labor, and any extra fees. Ask what is causing the problem, not just what part is being swapped. If the number feels large, getting a second opinion is reasonable. Costs vary by home, system age, and part availability, so a written quote matters more than a phone guess.
Think of an old car. One repair is fine. Repeated repairs add up. As a rough guide, systems past 10 to 15 years, or repairs that approach half the cost of a new unit, make replacement worth a conversation. Older systems that use phased-out refrigerant can also be costly to service. A provider can explain your options, and the choice stays yours.
Repair, then maintain. Once the AC runs, small habits protect it, like brushing teeth keeps the dentist away.
If your sump pump runs often in spring, tell the provider. A damp basement raises indoor humidity and makes your AC work harder.
A few good questions keep you in control:
Providers in our network are independent businesses, so confirm these details with each one directly.
We explain likely causes in everyday words so the estimate and the repair steps make sense to you.
Independent providers in our network serve homes across the area.
Ask each provider for a written quote that lists parts, labor, and any extra fees.
Learn simple filter, outdoor unit, and spring tune-up habits that help prevent the same breakdown.
These are typical U.S. ranges for common AC repairs. Your price depends on your system, its age, parts, and access. Always ask for a written quote before approving any work.
| Repair item | Typical range | Notes |
|---|---|---|
| Diagnostic visit | $75 – $200 | Often credited toward repair if you proceed |
| Capacitor replacement | $150 – $450 | Common heat-related failure |
| Contactor or relay | $150 – $400 | Electrical switch for the outdoor unit |
| Condensate drain clearing | $100 – $300 | Fixes water backups and shutoffs |
| Refrigerant leak repair and recharge | $200 – $1,500 | Varies with leak location and refrigerant type |
| Fan motor replacement | $400 – $1,100 | Indoor or outdoor motor |
Tell us what you notice, such as warm air, strange sounds, or ice, using the estimate form.
We connect you with an independent provider in our network who serves your area.
Look over the written estimate, ask questions, and approve only what makes sense.
Follow simple care habits so the system stays reliable all season.
We take time to explain what may be happening, so a first-time breakdown feels less confusing and more manageable.
Local providers do the work, so you can compare options and choose what fits.
Requesting an estimate carries no obligation, and you decide whether to move forward.
We share simple habits that help prevent a repeat breakdown next summer.
Tell us what your system is doing. Request an estimate, and a local provider in our network can follow up with next steps.
Common causes include a clogged filter, a dirty outdoor coil, low refrigerant, or a failed capacitor. Check the filter and thermostat first. If air is still warm, a provider can diagnose the cause.
Many repairs fall between $100 and $1,500 in the U.S., depending on the part and the work. Get a written quote from the provider before you approve anything.
You can turn the cooling off and run the fan to melt the ice. Finding out why it formed, such as an airflow problem or low refrigerant, is a job for a local provider.
Tell us what your system is doing. Request an estimate, and a local provider in our network can follow up with next steps.
No obligation