Everything Your AC Needs, Under One Roof
From emergency repairs to full system replacements, Summers & Zim’s handles every aspect of your home’s cooling and air quality. Our skilled technicians are equipped to tackle whatever your system needs — keeping you comfortable all season.
See What Our Customers Say
My service today was thorough and very professional. The S & Z technicians are always excellent. I will stick with this customer service oriented company for all my water, heating and cooling needs. A++!
Always on time, always professional and friendly and gets the job done. Have used them for years and years!!!!! Andrew was great
Extremely knowledgeable and Explains everything easily.
24/7 Emergency AC Service
Air conditioning emergencies don’t wait for convenient hours, and neither do we. Summers & Zim’s offers around-the-clock emergency AC repair across West Chester, Lancaster, Chester, and Delaware Counties. Day or night, our team is ready to respond and restore comfort to your home fast.
Design your Blue Collar Club Membership
Join the Blue Collar Club for peace of mind with priority scheduling, exclusive parts discounts, and the confidence that your home systems are always running at their best.
Not Sure Which Filter You Need?
We’ll help you find the right size and type for your system so you’re not guessing in the hardware store aisle.
Chester County's Trusted AC Experts Since 1930
When summer hits southeastern Pennsylvania, Summers & Zim’s keeps you cool. Our NATE-certified, EPA-accredited technicians bring 96 years of experience to every air conditioning repair and installation — all backed by our 5 Point Guarantee.
Our Guarantee
Design Guarantee
If our custom-designed HVAC or plumbing system doesn't meet your home's needs, we'll adjust or replace it at no cost.
No Lemons Guarantee
If a boiler section (10yr), hot water heater tank (6yr), or well pump (5yr) fails prematurely, we'll replace it for free.
$500 No Frustration Guarantee
If a new installation disrupts heating, cooling, or hot water for more than a day within the first two years, we'll pay you $500.
Home Protection Guarantee
We'll repair or replace any carpets, walls, floors, or furniture damaged by our team during a service visit.
100% Money Back Guarantee
If your installed system doesn't meet expectations, we'll remove it and refund your investment in full.