AC Not Cooling in Gaithersburg, MD? We Fix It Fast
Few things are more frustrating than an air conditioner that runs all day but never cools the house. If your Gaithersburg home is stuck warm and sticky, P&Y Heating and Cooling can find the cause quickly — it's usually one of a handful of common issues, and most are fixable.
Instead of guessing, we test the system methodically to pinpoint why the cooling dropped off, then explain the fix in plain language.
Why Your AC Isn't Cooling
When an AC runs but doesn't cool, the cause is usually one of these:
- Low refrigerant from a leak — the #1 cause of warm air
- A frozen evaporator coil restricting airflow
- A dirty or clogged air filter choking the system
- A failed capacitor or compressor in the outdoor unit
- A tripped breaker on the condenser while the indoor fan still runs
- A thermostat set wrong or a dirty outdoor coil
- Leaky or disconnected ductwork losing cooled air in the attic
How We Diagnose No-Cooling
A methodical check saves you from paying for parts you don't need.
Check the basics
We confirm the thermostat settings, filter condition, and breakers first — sometimes the fix is simple, and we'll tell you honestly.
Measure performance
We check the temperature split across the coil, inspect for a frozen coil, and measure refrigerant charge to spot a leak.
Test components
We test the capacitor, contactor, compressor, and fan motor, and inspect the coils and ductwork for airflow loss.
Explain and fix
You get a written diagnosis and price, and — for refrigerant leaks — an honest conversation about repairing the leak versus a bigger fix.
Frozen Coil? Don't Keep Running It
If you see ice on the refrigerant lines or indoor coil, turn the AC off and let it thaw. Running a frozen system can damage the compressor — an expensive repair. The freeze itself is a symptom, usually of low refrigerant or restricted airflow, and we'll fix the underlying cause, not just melt the ice.
The Humidity Factor
In Gaithersburg's humid summers, an AC that's low on refrigerant or has weak airflow struggles to remove moisture, so the home feels warm and clammy even if the thermostat reads okay. Restoring proper charge and airflow fixes both the temperature and the sticky feeling.
What a No-Cooling Repair Costs
It depends entirely on the cause. A dirty filter is free to fix; refrigerant leak repair or recharge runs $375–$1,150. Cost drivers:
- Whether it's a simple airflow issue or a refrigerant leak
- The refrigerant type (older R-22 is expensive)
- A failed capacitor ($215–$435) vs. a compressor (much more)
- Ductwork repairs if cooled air is being lost
- Diagnostic fee, commonly $89–$175, often credited toward the repair
Request Service
Fast response · No obligation · Upfront pricing
Why P&Y for a No-Cooling Diagnosis
When an AC runs but won't cool, a methodical diagnosis saves you from paying for the wrong part. Here's our approach.
We check the free fixes first
Thermostat, filter, and breakers get checked before anything else. If the fix is simple, we tell you honestly instead of writing a big repair ticket.
We find leaks, not just low charge
Refrigerant doesn't get used up — if it's low, there's a leak. We locate and repair the leak instead of topping off a system that'll be warm again next month.
We fix the cause of a freeze
A frozen coil is a symptom of airflow or refrigerant trouble. We melt the ice and fix what caused it, so it doesn't come back and damage your compressor.
Where We Provide AC Not Cooling / Warm Air
We diagnose and fix no-cooling problems across Montgomery County, including the humid, shaded homes of Cloverly where an under-charged or dirty AC leaves rooms warm and sticky. Same-day service is often available across the county.
We serve ac not cooling / warm air across Gaithersburg and all of Montgomery County, including:
AC Not Cooling / Warm Air FAQs
Why is my AC running but blowing warm air?
My AC cools but the house still feels humid — why?
Should I turn off my AC if it's frozen?
Can a dirty filter really stop my AC from cooling?
Trusted by Your Neighbors
Great service and very honest. My parents had an HVAC issue where they called two different companies and both said to replace the whole unit. We decided to go for a 3rd opinion and contacted P&Y. It turned out to be a simple fix.
Mario Velarde
Verified Google review
AC Repair
Pedro found and repaired the problem with our AC that others had missed. He was prompt, professional and very pleasant to deal with. Very important to us was that the cost was reasonable AND that he concentrated on fixing the AC instead of trying to sell us a new one. I strongly recommend him.
Norma Neuberg
Verified Google review
AC Repair
Have you ever heard 'You need a new system due to age, parts availability etc.'? Pedro knows how to keep your systems up and running, and you'll know you're getting the straight story rather than feeding large corporate overhead and expensive TV and radio campaigns. I've tried the rest: now try the best.
Alan Michaels
Verified Google review
AC Repair
Need AC Not Cooling / Warm Air in Gaithersburg?
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