Air Conditioning
Residential and Commercial Air Conditioning Services
When your air conditioning system breaks down, you need prompt, reliable HVAC service to restore comfort without disruption. Dennis's Heating & Cooling is a trusted, family-owned heating and cooling contractor serving San Francisco with expert air conditioning repair, maintenance, and replacement for both residential and commercial properties. With hundreds of 5-star reviews on Google and Yelp, we service all makes and models. We are able to provide everything from seasonal tune-ups and energy-efficient upgrades to full system installations and 24/7 emergency AC repairs. Whether it’s a small fix or a complete system failure, our experienced and skilled technicians deliver fast, professional solutions to keep your home or business comfortable year-round.
Reliable AC Repair, Installation & Maintenance in San Francisco
Whether your air conditioning needs a simple checkup or an emergency service in San Francisco, Brisbane, or Daly City, our team will meet its needs. Our services include the following:
- A/C Maintenance & Repair: We fix, repair, maintain, and improve all types of cooling units and systems, including air conditioners, heat pumps, and dual fuel hybrid systems, ensuring they are ready to handle hot temperatures and outdoor conditions.
- A/C Installation: Does your air conditioner struggle when the weather is warm or need frequent repairs? It may be time for a replacement or upgrade. If so, contact Dennis's Heating & Cooling in San Francisco. Our expert team helps property owners with the installation of energy-efficient air conditioners, heat pumps, and dual fuel hybrid systems for their residential and commercial needs. We only install trusted equipment from top-quality manufacturers like Carrier and Trane to ensure you will have modern technology, reliability, and efficient performance for years to come.
Signs Your Air Conditioning Needs Repair in San Francisco
If your A/C unit isn’t cooling properly in San Francisco, small problems can quickly turn into expensive repairs. Dennis's Heating & Cooling helps homeowners and businesses with commercial or residential air conditioning issues to catch them early. We can repair the causes of weak airflow, unusual noises, and rising energy bills so your system stays efficient and reliable. If you are experiencing a problem with your air conditioner, including any of the issues below, contact Dennis's Heating & Cooling for fast, reliable residential and commercial air conditioning and HVAC service for all makes and models throughout the San Francisco area.
- Warm Air or Weak Airflow: If your system isn’t delivering consistent cool air, it may point to low refrigerant, compressor trouble, clogged filters, dirty coils, or a failing blower motor that reduces performance and comfort.
- Unusual Noises: Screeching, grinding, or clanking sounds can signal worn belts, loose components, or motor issues, while buzzing or hissing may indicate electrical problems or refrigerant leaks that require prompt repair.
- Frequent Short-Cycling: When your AC turns on and off repeatedly without properly cooling the space, it places excessive strain on the system and often calls for professional troubleshooting.
- Foul Odors: Musty smells may mean mold or bacteria in ductwork, while burning odors can suggest overheating parts or electrical concerns that should be addressed immediately.
- Water or Refrigerant Leaks: Moisture or pooling water around your unit may be caused by a clogged drain line, while refrigerant leaks can impact efficiency and safety.
- Rising Energy Bills: A sudden spike in utility costs often indicates your HVAC system is working harder than necessary due to hidden mechanical or efficiency issues.
Expert AC Repair Services to Restore Your Comfort Quickly
Hot summers and warm days are just part of life around the Bay Area and the Peninsula. When temperatures rise, you need to ensure you have an air conditioner you can count on. At Dennis's Heating & Cooling, we make it our priority to keep your home or business comfortable all year long with reliable, efficient A/C service you can trust.
If a problem with your air conditioning system arises, our experienced team is ready to come out, inspect your system, and recommend the right solution—whether that’s a quick repair, routine maintenance, or a full replacement. We’ll walk you through your options and help you choose what makes the most sense for your comfort and your budget.
We proudly serve homeowners and businesses throughout San Francisco and across the Peninsula, including San Bruno, Millbrae, San Mateo, Redwood City, and Palo Alto. No matter where you’re located, you can count on fast, honest, and top-quality workmanship every time.