Air Conditioning Repair

When your AC stops cooling in the middle of summer, you need a fast diagnosis and a real fix — not a temporary patch.

Summer in central Massachusetts comes with real heat and humidity, and an air conditioner that is not performing makes every day in your home uncomfortable. The problem is rarely just one thing — it could be low refrigerant, a failed capacitor, a frozen evaporator coil, or a compressor that is on its way out. At Shelly Heating and Cooling, we do not guess at AC problems. We work through the system methodically, find the actual cause, and give you a straight answer on what it will take to fix it. You know exactly what you are dealing with before any work begins.

We repair all makes and models of central air conditioning systems across Winchendon, Gardner, Athol, Leominster, Fitchburg, Templeton, and the surrounding towns throughout Worcester County. No matter how old your system is or what brand it is, we have the experience to diagnose it correctly. Some repairs are quick — a capacitor swap or a refrigerant recharge can have your system back up and running the same day. Others take more work. Either way, we give you an honest assessment of whether the repair makes sense or whether replacement is the smarter long-term move.

We are available 24 hours a day for AC repairs, because a broken air conditioner during a heat wave is not something you should have to wait until Monday morning to address. Call Shelly Heating and Cooling at (978) 868-3403 and we will get someone out to diagnose the problem fast. Our goal on every call is to restore your comfort as quickly as possible — and to make sure the repair we do actually holds up.

What We Offer:

Emergency AC Repair — Available 24/7 for air conditioning systems that fail without warning, including during heat waves, weekends, and holidays throughout Winchendon and Worcester County.
Refrigerant Leak Detection & Recharge — Low refrigerant is one of the most common reasons an AC stops cooling properly. We locate the leak, repair it, and recharge the system to the correct level.
Capacitor & Contactor Replacement — Failed capacitors and contactors are among the most frequent AC electrical failures. We carry common parts and handle these repairs efficiently on the same visit.
Evaporator & Condenser Coil Service — Dirty or frozen coils reduce cooling output significantly. We clean, inspect, and repair coils to restore proper heat exchange and system efficiency.
Compressor Diagnosis & Repair — The compressor is the heart of your AC system. When it fails or underperforms, we diagnose it accurately and advise honestly on whether repair or replacement makes more sense.
Blower Motor & Fan Repair — A malfunctioning blower or condenser fan affects airflow and can cause the entire system to overheat and shut down. We repair and replace motors and fan assemblies across all major brands.
Thermostat & Electrical Diagnosis — Sometimes an AC problem starts with a wiring issue or a thermostat that is not communicating correctly with the system. We trace electrical faults and fix them at the source.

Why Choose Shelly Heating and Cooling for Air Conditioning Repair

24/7 Availability — Including Heat Waves — We do not shut down when the temperature climbs. If your AC fails on the hottest day of the year, we are reachable around the clock. Winchendon and the surrounding towns in Worcester County and Franklin County are covered every hour of every day.
Honest Repair vs. Replace Advice — If your system is worth fixing, we fix it. If it is not, we tell you that plainly and explain why. We are not going to push a full replacement on a system that has years of useful life left — and we are not going to keep patching one that is going to keep failing on you.
Same-Day Repairs on Most Issues — We arrive prepared. For the most common AC failures — capacitors, contactors, refrigerant issues, thermostat faults — we carry the parts and handle the repair on the same visit. You are not waiting days for a follow-up appointment.
All Makes and Models Serviced — We work on every major brand of central air conditioning system. Whether your equipment is newer or has been running for 20 years, we have the experience to diagnose and repair it correctly.
Family-Owned Accountability — Shawn Shelly owns this business and stands behind every repair. If something is not right after a job, you are calling the owner directly — not navigating a customer service department.