Heat pump service in Hillsborough, CA from Plum HVAC provides comprehensive diagnostics, installation, maintenance, and IAQ improvements to ensure reliable year-round comfort and energy efficiency. We outline common local issues such as refrigerant leaks, airflow problems, and component wear, then detail our services including sizing, repairs, routine tune-ups, performance testing, and warranty support. We also explain what a diagnostic visit looks like, our installation process, the benefits of maintenance, and strategies for indoor air quality, warranty assistance, and access to local rebates.

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Heat Pump Service in Hillsborough, CA

Heat pump service in Hillsborough, CA helps protect comfort, energy efficiency, and long-term value for local homes. With the Bay Area climate of mild winters and occasional summer heat waves, properly sized and maintained heat pumps deliver reliable year-round heating and cooling while supporting California goals for electrification and lower utility bills. This page explains common heat pump issues in Hillsborough homes, the full range of services offered, what to expect during diagnostics and installations, and how timely care improves comfort and indoor air quality.

Common heat pump issues in Hillsborough, CA

Homeowners in Hillsborough commonly see these heat pump problems:

Refrigerant leaks and low charge — reduces capacity and increases run time.
Reduced airflow — dirty filters, blocked coils, or failing fans lower comfort and efficiency.
Short cycling or frequent on/off — often caused by incorrect sizing, refrigerant issues, or control faults.
Failing compressors or reversing valves — typical end-of-life or heavy-wear failures.
Corrosion and electrical faults — salt air from the Bay and moist Pacific influence can accelerate corrosion in outdoor units.
Thermostat and control issues — communication faults, incorrect setpoints, or zoning control failures.
Duct leaks or insulation loss in older Hillsborough homes — leads to uneven comfort between rooms.

Heat pump services offered

A comprehensive heat pump program for Hillsborough homes typically includes:

Installation and sizing
Manual J load calculations tailored to Hillsborough home layouts, insulation levels, and sun exposure.
Ducted and ductless (mini-split) options for multi-zone comfort in larger or renovated properties.
Permit and code compliance for California standards and local Hillsborough requirements.
Replacement and system upgrades
Evaluation of repair versus replace based on age, efficiency, and projected costs.
Upgrades to higher-efficiency compressors, variable-speed blowers, and multi-stage thermostats to improve comfort and lower energy use.
Repairs and emergency service
On-site diagnostics, component replacement, and safety checks.
Emergency response options for loss of heating or cooling during extreme weather, with prioritized scheduling and temporary measures when needed.
Routine maintenance and tune-ups
Seasonal inspections, coil cleaning, refrigerant leak checks, airflow testing, and performance tuning.
Preventive care that restores efficiency and extends equipment life.
Diagnostics and performance testing
Full system evaluation including refrigerant pressures, subcooling and superheat, electrical load testing, and airflow measurement.
Written findings and transparent recommendations for repair or replacement.
Indoor comfort optimization
Zoning and thermostat calibration, humidification/dehumidification control, and air balancing to reduce hot and cold spots common in Hillsborough residences.
Indoor air quality integration
Upgrades to higher-MERV filtration, UV germicidal lights, and whole-home ventilation options that work with heat pumps to improve air quality and manage humidity.
Warranty and rebate assistance
Guidance on manufacturer warranty coverage, labor warranty options, and help completing paperwork for state and utility incentives commonly available in California.

What a diagnostic visit looks like

A professional diagnostic visit for your Hillsborough home typically follows these steps:

Arrival and system history review, including recent symptoms and prior service records.
Visual inspection of indoor and outdoor units for corrosion, leaks, and mechanical damage.
Operational tests while the system runs: refrigerant pressure, temperature splits, amperage draw, and airflow.
Safety and electrical checks on contactors, capacitors, and control circuits.
Clear, written diagnostic report that outlines immediate repairs required, optional efficiency upgrades, and an estimated timeline and parts needed.

Expect technicians to explain repair options and whether replacement is a better long-term choice based on efficiency gains, remaining life expectancy, and local energy costs.

Installation and replacement process

New heat pump installations in Hillsborough focus on performance, permits, and commissioning:

Proper sizing and equipment selection to match square footage, insulation, and occupancy patterns.
Coordinated installation with attention to noise control, aesthetic placement of outdoor units, and routing of refrigerant lines and condensate.
Permit procurement and code inspections to meet California regulations.
System commissioning that includes refrigerant charge verification, airflow balancing, thermostat programming, and a homeowner walkthrough on operation and maintenance.
Support registering manufacturer warranties and filing potential local or state rebates.

Typical installation timelines vary by system complexity but include pre-install planning, permit processing, installation day, and post-install testing.

Maintenance checklist and benefits

Seasonal tune-up items that protect Hillsborough homes:

Replace or clean filters and check airflow.
Clean indoor coils and outdoor condensing coils.
Test and adjust refrigerant charge and pressures.
Check electrical components and tighten connections.
Lubricate moving parts and test safety controls.
Inspect and clear condensate drains.

Benefits of regular maintenance:

Improved energy efficiency and lower utility bills.
More consistent indoor comfort and quieter operation.
Longer equipment life and reduced risk of emergency failures.
Faster, simpler warranty claims when repairs are needed.

Indoor air quality and comfort strategies

Heat pumps work well with IAQ upgrades that Hillsborough homeowners value:

Higher efficiency filtration (MERV 8 to MERV 13 depending on system capability).
UV-C lights near the indoor coil to reduce microbial growth.
Whole-home ventilation or ERV systems to manage humidity and fresh air without losing efficiency.
Zoning and smart thermostats for targeted comfort in bedrooms, attics, and sun-facing rooms.

Technician credentials, response times, warranties, and rebate help

Qualified technicians for Hillsborough heat pump service typically hold:

EPA refrigerant handling certification and factory training on major brands.
California contractor licensing for HVAC work and local permitting knowledge.
Ongoing manufacturer training, NATE certification, and background-checked field technicians.

Service timelines and support:

Many providers offer routine scheduling with same-day or next-day appointment options for non-emergencies.
Emergency service options are available with prioritized response and temporary solutions when immediate repairs are required.
Assistance is provided with warranty claims, manufacturer registration, and navigating state and utility rebates commonly available for high-efficiency heat pump installations in California.

Heat pump service in Hillsborough, CA protects your home comfort, lowers energy use, and helps you take advantage of local electrification incentives. Professional diagnostics, regular maintenance, and correctly executed installations ensure reliable performance across the mild Bay Area climate and deliver better indoor air quality and efficiency for years to come.

testimonials

hear what our satisfied clients have to say

5.0

We found Plum HVAC in 2024 after spending more than 2 months searching and comparing estimates. The owner Sam gave us a very competitive price for a Mitsubishi mini-split and the installation went off without a hitch. Our experience was so positive that we later requested their services twice more to also install A/Cs for our 2 other rooms. Their technician, Jake, led our installations each time and we were very impressed by their professionalism and quality of work. Now 1 year in and we could not be any happier, nor have we encountered any issues with our models.

Jesse Y.

5.0

Sam of Plum HVAC, responded to our Heat Pump installation request promptly and provided a very competitive estimate after an onsite visit. He was very flexible and patient to answer and explain our questions. After we signed the contract, he and his team of 4 worked very hard to deliver and install the whole Heat Pump system on time with good quality. I am particularly impressed by their problem solving skills to overcome different connection challenges for the attic installation. Each day before they started, they covered the floors with protection blankets and cleaned after they were done for the day. They also revised the drainage and electric work per the city inspection guidance. Sam and his team were professional and honest so we highly recommend Plum HVAC to any customers who need HVAC work done for their houses.

Chunshi C.

5.0

We needed to install a mini-split in a backyard unit. Sam and his team helped with this, and they did a fantastic job. Sam visited our place and clearly explained to me what needed to be done, and offered a great price. He scheduled the job for a few days later, and his team performed the job with extraordinary quality. Later, I noticed a minor issue and reached out to them. Sam helped me to fix the issue on a second visit by his team later in the week, providing top-notch customer service. I will work with them in the future for my HVAC jobs, and highly recommend them given their excellent work quality and customer service.

Majid J.

5.0

I reached out to 4 companies for mini split quotes; Plum HVAC pricing came in the lowest. Beyond that, Sam was very knowledgeable and kind during the in home consultation. He offered a quote in person, & stuck by it. They removed our old furnace, and installed a two head mini split in our two story townhouse. The work as you can see is very clean! The guys who installed it were very fun & professional. Sam & his team were communicative the whole way through including the permitting process. They took roughly one full day for install, which was very fast! Including removal & disposal of our old furnace. Natalie was very helpful throughout the Bayren Rebate process & always available for any questions! This system has changed our lives, wish we would have gotten it done sooner! It’s way better than we could have imagined.

Bobby R.

5.0

Plum HVAC exceeded my expectations in every way. Sam and his installer team were not only professional but also incredibly responsible throughout the entire process. They provided top-notch service at a very reasonable price, which is hard to come by these days. I highly recommend Plum HVAC to anyone looking for quality HVAC services. You won't be disappointed!

A Chui

5.0

I recently engaged Plum HVAC to install two mini-split units at my residence, and I'm thrilled with the outcome.Throughout the entire process, from the initial consultation to the project's completion, Plum HVAC showcased professionalism and expertise. The technician, Sam, arrived promptly and conducted a comprehensive assessment of my HVAC system. Sam took the time to thoroughly explain the technicians' tasks, the estimated duration of the project, and provided transparent pricing options.

Romero J.

5.0

Wonderful experience with Plum HVAC on a heat pump installation! I checked several companies, compared their recommendations, timelines, reputations and prices.Sam, the owner, was very professional and has almost 2 decades of experience in HVAC. When I asked dumb questions, he answered most graciously. And when I noted that some companies we queried said we could get away WITHOUT replacing our original ductwork from 1965, he gave us his honest opinion why that wasn't a good idea. (Hubby remembered later that people who worked in our attic adding insulation told us there were lots of duct leaks.)

Marlene S.

5.0

I called 8 different HVAC companies for quotes for a heat pump heating/ac system because I want to save money by switching from a forced air gas furnace to an electric heat pump system which will give me both heating and air conditioning. In addition my old furnace (circa 1991) was way oversized for my home and the air coming out too noisy. The New heat pump system is quieter and more efficient. Back to the quotes for the system, all the other 7 companies sent a salesperson/advisor to give the quote. Sam, the owner of Plum HVAC came our to give the quote. He was quick with his quote and was very knowledgeable. He didn't try to upsell me on anything and have the lowest quote of them all. His price was 60% less than the highest quote and 15% lower than the next second lowest quote.

Michael C.

5.0

Plum HVAC is an extremely professional, knowledgeable, and an established company to hire. I highly recommend Plum HVAC! Sam and his crew did a wonderful job. Sam worked with my schedule and his crew had completed the job with ease.

Blake

5.0

Sam was one of the most professional business owners I had the chance to meet over the past few years and I'm so happy I trusted him to install our new A/C unit.- He showed up on time- He was transparent (and reasonable) regarding pricing- He offered 2-3 options- His crew did a very clean/thorough jobWhat I loved the most though, was the fact he was very easy to communicate with. I would definitely use him again and recommend him to our neighbors/friends.

Bruno L.

5.0

We recently had a complicated Bryant Evolution dual fuel system with variable speed and zoning installed in our home by Plum HVAC, and we are very pleased! The team also changed the entire crawl space ducting, ensuring a comprehensive upgrade. The price was fair, and the team was always on time and easy to contact. Sam Mousavi, the head of the team, paid great attention to detail and demonstrated a strong understanding of systems. His expertise in HVAC systems and his friendly character made us feel comfortable throughout the process. We highly recommend Plum HVAC for their professionalism and excellent service.

Amirali B.

5.0

I cannot say enough about Plum HVAC, who replaced my aging heater furnace, and in particular Sam. Sam was very highly recommended by my sister, who replaced her furnace and added air conditioning.First, they gave me a good deal for a 2-stage, at the same cost as the lowest bid for a 1-stage. The other bids were dancing around some gas line work made by previous owners.

Kumar S.

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