It’s a hot, sticky day in the Quad Cities, your thermostat is set to cool, the AC is running, and your home still feels warm. Before you assume the worst, a few simple checks can catch the easy stuff, and knowing what a real repair costs helps you decide when it’s time to call. This guide covers both.
If you smell burning, see smoke, hear loud electrical buzzing, or the breaker keeps tripping, turn the system off and call a professional right away. Do not keep running an AC that seems unsafe.
AC Repair in the Quad Cities
Doug’s Heating & Air Conditioning has handled air conditioning repair across the Quad Cities since 1962. We cover Davenport, Bettendorf, Moline, Rock Island, East Moline, and the surrounding towns with 24/7/365 emergency service, so a system that quits on a Saturday night is not a problem you have to sit with until Monday.
Our technicians are union-trained and work on every major brand, including York and Mitsubishi. When your AC is not cooling, we diagnose the actual cause, explain what we find in plain language, and give you upfront pricing before any work starts. No guessing, no surprises on the invoice.
Why Is My AC Not Cooling? 9 Things to Check First
Many “no cool” calls come down to something simple. Work through these before you book a repair. They are all safe for a homeowner, and they help you give us better information if you do need a visit.
1. Double-check your thermostat settings
A lot of AC-not-cooling calls start with a thermostat set wrong. Confirm:
- Mode: Set to Cool, not Heat, Off, or Fan Only.
- Temperature: Set a few degrees below the current room temperature.
- Fan setting: Choose Auto, not On. On runs the blower constantly and can push room-temperature air even when the system is not actively cooling.
- Schedule: On a programmable or smart thermostat, make sure an energy-saving schedule is not holding the temperature higher than you expect.
If the display is blank, flickering, or showing errors, you may have a thermostat or low-voltage control issue that needs a technician.
2. Check your air filter and return air
A clogged filter is one of the most common reasons an air conditioner cannot keep up.
- Locate the filter (usually at the return grille or in a slot near the indoor unit).
- Slide it out and inspect it. If it is gray, fuzzy, or packed with dust, replace it.
- Make sure return grilles are not blocked by furniture, rugs, or boxes.
A severely clogged filter starves the system for air, which hurts cooling and can freeze the indoor coil. A fresh filter is an easy first step.
3. Make sure supply vents are open and unobstructed
Closed or blocked vents can make it feel like the AC is not working in certain rooms.
- Open all supply registers fully.
- Move furniture, curtains, and rugs away from vents.
- Note any rooms that stay much warmer than others. That is useful information for your technician.
In many older Quad Cities homes, a few closed vents can cause hot spots and make the whole system feel underpowered.
4. Listen and look at the outdoor unit
The outdoor unit (condenser) does a lot of the heavy lifting. Step outside and check:
- Is it running? If the indoor blower runs but the outdoor unit is silent, there could be an electrical, thermostat, or safety-switch issue.
- Is the fan spinning? A humming sound with no spinning fan often points to a bad capacitor or motor.
- Is it clogged with debris? Clear away leaves, grass clippings, and cottonwood fluff. Aim for 2 to 3 feet of open space around the unit.
Never put your fingers or tools into the fan or remove panels while power is on. Visual checks only.
5. Confirm the system has power
If your AC has lost power, it will not cool no matter what the thermostat says.
- Indoor unit switch: Look for a light-switch-style power switch on or near the indoor unit. Make sure it is On.
- Breaker panel: Find breakers labeled AC, condenser, air handler, or HVAC. If one is tripped, reset it once. If it trips again, stop. That is a sign of an electrical or motor problem for a pro.
- Outdoor disconnect: Many outdoor units have a small disconnect box nearby. Make sure the pull-out has not been switched off.
6. Look for signs of a frozen indoor coil
When airflow is restricted or refrigerant is low, the indoor coil can ice over and stop cooling. Signs include:
- Little or no air from the vents even though the blower is running.
- Ice on the refrigerant lines near the indoor unit.
- Water around the furnace or air handler after the system shuts off.
If you see these, turn cooling Off, set the fan to On to help the ice melt, and give it several hours to thaw. If the coil keeps freezing, you have a deeper airflow or refrigerant problem that needs professional AC repair.
7. Check doors, windows, and heat sources
Sometimes the AC is working, but the home is gaining heat faster than the system can remove it.
- Make sure windows and exterior doors are closed and latched.
- Close blinds on windows getting direct sun.
- Move lamps, electronics, and other heat sources away from the thermostat, which can trick it into misreading the temperature.
8. For heat pumps, confirm the mode
Many Quad Cities homes use heat pumps or ductless mini-splits that heat and cool from the same outdoor unit.
- Confirm the thermostat is set to Cool.
- After switching from heat to cool, give it a few minutes to avoid short cycling.
- Make sure the outdoor unit is running and not blocked.
9. Know when to stop and call Doug’s
Once you have checked the thermostat, filter, vents, outdoor unit, and power, stop guessing. Call Doug’s if you notice any of these:
- Warm air or no air from vents after the basic checks
- Breakers that trip more than once
- Loud grinding, screeching, or metal-on-metal noises
- A strong electrical or burning smell
- Ice on the refrigerant lines or outdoor unit
- Short cycling (the system starts, stops quickly, and repeats)
We offer 24/7/365 emergency AC repair throughout the Quad Cities, so you are not stuck sweating it out until business hours.
Most Common AC Repairs We See in the Quad Cities
Doug’s tracks what actually fails on Quad Cities systems, and a handful of repairs cover most of our summer calls. Knowing them helps you understand a diagnosis when you hear it.
- Failed capacitor. The most common single-point failure. The capacitor gives the motors the jolt they need to start. When it weakens, the outdoor fan or compressor hums but will not start. One of the cheaper repairs when caught early.
- Refrigerant leak and low charge. Low refrigerant means weak cooling and, often, a frozen coil. The real fix is finding and repairing the leak, not just adding refrigerant.
- Frozen evaporator coil. Usually caused by restricted airflow (dirty filter or coil) or low refrigerant. The coil has to thaw before the true cause can be diagnosed.
- Bad contactor. The electrical switch that powers the outdoor unit. Pitted or stuck contacts stop the condenser from running.
- Blower motor or fan motor failure. No air movement inside, or a dead fan outside. Motors that run hot and loud are often on their way out.
- Thermostat or control problems. A miswired, failing, or dead thermostat can mimic a much bigger failure.
How Much Does AC Repair Cost in the Quad Cities?
Most AC repairs in the Quad Cities fall between about $150 and $650, depending on the part and the labor involved. Doug’s diagnoses the problem first, then gives you a flat, upfront price before we start, so you approve the cost before any work happens.
General ranges we see for common repairs:
- Capacitor replacement: roughly $150 to $400
- Contactor replacement: roughly $150 to $350
- Refrigerant leak repair and recharge: varies widely by leak location and system; we quote after the leak search
- Blower or fan motor: roughly $400 to $700+ depending on the motor
- Thermostat replacement: roughly $150 to $350 for a standard model
These are typical estimates, not a quote. The exact cost depends on your equipment, the part, and how much labor the repair takes. We charge a diagnostic fee to find the problem, and we tell you the repair price before proceeding. Call us in Iowa at 563.326.1223 or Illinois at 309.764.2500 for exact pricing on your system.
Repair or Replace? The $5,000 Rule
The $5,000 rule is a quick way to decide whether to repair or replace an air conditioner. Multiply the age of the unit in years by the estimated repair cost. If the result is over $5,000, replacement is usually the smarter move. If it is under, repair typically makes sense.
A 12-year-old system with a $500 repair comes to $6,000, which leans toward replacement. A 5-year-old system with a $400 repair comes to $2,000, which is an easy repair call. Age matters because older units are also less efficient and closer to other failures, so you can pour money into a system that will not last. When the math is close, we walk you through both options and the replacement costs honestly, then let you decide.
What Doug’s Will Check on a No-Cool Call
When you schedule a visit, your Doug’s technician will:
- Test the thermostat and low-voltage controls
- Check electrical connections, capacitors, and contactors
- Inspect and clean the outdoor unit and indoor coil where accessible
- Verify refrigerant levels and look for leaks
- Measure airflow and static pressure
- Evaluate blower motor performance
- Confirm safe, efficient operation
You get clear explanations, upfront options, and repair recommendations that fit your home and budget.
Prevent the Next AC Breakdown
The best way to avoid a no-cool emergency is to catch problems before summer hits. A weak capacitor found in May is a $200 fix on your schedule instead of a holiday-weekend emergency call. Doug’s AC tune-up and maintenance plan includes a full cleaning and inspection that finds worn parts early, keeps the system efficient, and helps protect your manufacturer warranty. Our Planned Maintenance Agreement covers both your cooling and heating systems with two visits a year.
Frequently Asked Questions
Who should I call if my AC isn’t working in the Quad Cities?
Doug’s Heating & Air Conditioning provides 24/7/365 AC repair across Davenport, Bettendorf, Moline, Rock Island, and the surrounding Quad Cities. After you have checked the thermostat, filter, and breaker, call us in Iowa at 563.326.1223 or Illinois at 309.764.2500 and we will diagnose the problem and give you upfront pricing before any work.
What is the most common AC repair?
A failed capacitor is the most common AC repair. The capacitor starts the compressor and fan motors, and when it weakens the outdoor unit often hums without starting. It is also one of the least expensive repairs when caught before it strands the whole system on a hot day.
What is the $5,000 rule for AC?
The $5,000 rule multiplies the age of your AC in years by the repair cost. If the total is over $5,000, replacement is usually the better value. A 12-year-old unit needing a $500 repair reaches $6,000, which points toward replacing rather than repairing.
How much does an AC service call cost?
Doug’s charges a flat diagnostic fee to find the problem, then quotes the repair price before starting. Most Quad Cities AC repairs land between about $150 and $650 depending on the part and labor. Call for the exact diagnostic fee and pricing on your system.
Is it worth repairing an old air conditioner?
It depends on the age of the unit and the cost of the repair. Use the $5,000 rule as a starting point, and factor in efficiency. A unit over 12 to 15 years old that needs an expensive repair is often better replaced, since older systems cost more to run and are closer to further failures. We give you both options honestly so you can decide.
Ready for Help? Doug’s Is Here 24/7
If your AC still is not cooling after these checks, do not sweat it out. Doug’s Heating & Air Conditioning has kept Quad Cities homes comfortable since 1962 with fast, clean, and efficient service. We serve Davenport, Moline, Rock Island, Bettendorf, East Moline, and communities throughout the region, including Carbon Cliff, Coal Valley, Colona, Eldridge, Hampton, Le Claire, Milan, Orion, Sherrard, and Silvis.
Call us in Iowa at 563.326.1223, in Illinois at 309.764.2500, or request service online. We will get your home cooling again.
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