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Find Air conditioning pros in Redwood City

Avatar for Global Green Solutions
Global Green Solutions
5.0(
248
)

Serving Redwood City, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Very happy with the new installation, replacement, and repair services for heating and air conditioning! The technicians were courteous, well-informed, and on time. They promptly resolved the problem and provided comprehensive explanations. A truly professional and trustworthy crew. Strongly suggested!"
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+24

Response time3 days
11 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for DUKES HEATING & AIR CONDITIONING
DUKES HEATING & AIR CONDITIONING
4.8(
135
)

Serving Redwood City, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Fair service on my furnace. The thing I am concerned is I was overcharged with the Thermostat they installed. I paid $145.00 for a thermostat costing $85.00. I checked price from other businesses to see how much the same Thermostat cost. Also, found out after they left that the name of their business is inscribed in the thermostat they installed. It should even be discounted since they are using the thermostat to advertise their business. This is taking advantage of innocent people like me. Won't use them again."
Heat Pump Repairs & Installations
Central Air Cut-Ins
Electric Furnace Repairs & Installations
Response time4 days
31 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Global Comfort Heating and Air
Global Comfort Heating and Air
4.8(
52
)

Serving Redwood City, CA and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Excellent service just had a new air conditioner installed with new ducting Rudy and team saved the day. Also serviced my old heater at no extra cost will definitely be calling them back to install my heater in December!"
Team Global Comfort Truck
Carrier Heater Changeout
Duct Install securing runs
Duct Install securing runs
Carrier 95% Installation

+9

Response time50 mins
Response rate94%
5 neighbors recently requested a quote
Avatar for Comfort Energy Inc
Comfort Energy Inc
4.6(
120
)

Serving Redwood City, CA and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"Air conditioner was blowing ambient air only. Tried to contact my usual HVAC company and they were scheduled out 3 weeks because of the recent heat wave. I called 14 companies to check on availability and Comfort Energy was the only one who had an opening within the week. I confirmed with them and was very pleasantly surprised. They confirmed not only the day and time, but also the exact make, model, ans serial number of the unit to ensure they had all the information they needed. In the meantime, my husband was able to get the unit going by installing a new capacitor himself, which he had done in the past, but wanted to go ahead with the service call so we could have the whole system checked out in case there were other issues. The day before the appointment, I received a text confirming the appointment time. I asked that the service technician call 30 minutes before arrival, which he did. The technician, Nasser Pineda, is a fine representative for his company. He was polite, respectful of both my husband and me, and took time at the start of the service call to go over what he would be doing and how he hoped to provide us with the best service we had ever had. He said that the goal of Comfort Energy was to provide us with service above and beyond expectations. He did not fail us. He even wore booties so that he did not track dirt into the house. My husband followed him around asking questions and he was patient and knowledgeable. Nasser also told us about their yearly service plan which would ensure service checkups before the heat of the summer and for the heater before winter cold months. That, plus the guarantee that we would get priority appointment times even during heavy demand, has clinched our participation. Nasser and Comfort Energy know how to do it right; ensure that the client doesn't want to go anywhere else for their HVAC service."
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+12

Response time1 day
55 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Valley Heating, Cooling, Electrical and Solar
Valley Heating, Cooling, Electrical and Solar
4.7(
1,755
)

Serving Redwood City, CA and surrounding areas

Approved

In business since 1962

Free estimates

Emergency services offered

"I chose them because they had the best quote, but were still professional. They arrived on time, were very professional, cleaning up well after each day's work. Turns out the air didn't work. We discovered this on a Sunday. They came over within a few hours and fixed the problem immediately. No issues since."
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We provide HVAC sheet metal fabrication, blown in insulation with Owens Corning’s new AttiCat™ Expanding Blown-In PINK FIBERGLAS® and Solatube® installations to add light where you need it without the increasing your electric bill.
The SunSource® Home Energy System puts you in control of your monthly bills by creating and using solar energy, reducing your need for electricity from your utility provider.
Owners, Jeff and Cindy Faulkner
12 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Alanis Air HVAC
Alanis Air HVAC
5.0(
16
)

Serving Redwood City, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Warranties offered

"I highly recommend this company to do your heating and air conditioning project. John Alanis and his crew did an excellent job and the pricing he gave us beat the competition. Thank you John and I’ll make sure to spread the word to my friends and relatives."
York Heat Pump
York 3 Ton heat pump
Coil removal
Condenser Removal
Ductwork

+4

Response time3 hrs
Response rate99%
46 neighbors recently requested a quote
Avatar for Aire Serv of Campbell & Saratoga
Aire Serv of Campbell & Saratoga
4.9(
21
)

Serving Redwood City, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1991

Free estimates

Emergency services offered

"Great team. While the job is messy as they have to work under your house. Aire Serv was great to work with. We needed new ducts and boots and my house is now moving air better than it has in twenty years. Highly recommend Aire Serv."
Furnace install
Heat Pump - Condo Install
Heating & A/C Project
Water Heater Replacement
System Swap Out

+58

117 neighbors recently requested a quote
Recommended by57%of homeowners
Avatar for Air & Plumbing Systems Inc.
Air & Plumbing Systems Inc.
4.6(
85
)

Serving Redwood City, CA and surrounding areas

Approved

In business since 2006

Free estimates

Offers commercial services

"This was the first time we decided to install a AC and heating . I did quite a bit of research and decided to go with Air & Plumbing Systems, Inc. .The guys are great. Not only they gave us the best possible price but they also were able to provide us with a quality service in a timely manner.And they were patiently explaining every step that they were doing. when we had questions The whole process was painless and fast. They were done in couple of days and then they actually called followin up on the project making sure that everything workis fine. Professional work. Overall very pleasant experience."
Response time2 hrs
Response rate93%
4 neighbors recently requested a quote
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FAQs for air conditioning projects in Redwood City, CA

Most professional HVAC technicians require two to three hours to complete an expansion valve replacement. The timeframe depends on your unit's accessibility and whether additional repairs are needed. The process involves recovering refrigerant, removing the old valve, installing the new component, and recharging the system. Scheduling during less busy seasons may result in more convenient appointment times.

Operating your air conditioner with a malfunctioning expansion valve isn't advisable. Continuing to run the system could potentially damage other components, particularly your compressor, which is significantly more expensive to replace. If you notice performance issues like inconsistent cooling or unusual noises, it's best to have your system inspected before continuing regular use.

Expansion valves don't have a standard replacement schedule, as their longevity depends on system usage, maintenance frequency, and environmental factors. Regular professional maintenance helps identify potential valve issues before they cause system failure. Having your HVAC system serviced annually allows technicians to monitor component condition and recommend preventative replacements when necessary.

Refrigerant leaks require prompt professional attention. If your expansion valve is leaking, you'll likely notice reduced cooling performance and possibly hear hissing sounds near the unit. Addressing leaks quickly prevents further system inefficiency and avoids the environmental impact of released refrigerant. Your HVAC technician will need to repair the leak and recharge the system with the proper refrigerant type and amount.

Because many AC issues present similar symptoms, professional diagnosis is recommended. Problems like inadequate cooling, inconsistent temperatures, or strange noises could indicate expansion valve issues, but might also stem from refrigerant leaks, electrical problems, or airflow restrictions. A qualified HVAC technician has the tools and expertise to accurately identify the root cause and recommend appropriate repairs.

The Redwood City, CA homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.