Full-Service Plumbing, Heating, and AC Solutions for Homeowners in San Marcos, CA
Looking for home services professionals who can get the job done without hassle? Work with our team at Thompson Plumbing Heating and Air Conditioning for exceptional service. Our San Marcos plumbers and HVAC technicians will take the time to understand your needs and present you with options that fit your goals and budget.
Call today for quality plumbing and HVAC services in the San Marcos, CA area. Your peace of mind is our priority–we will work closely with you to identify the source of your plumbing, heating, or cooling problem and offer the best solution for your home.
Work With the Preferred Heating and Air Conditioning Company in San Marcos, CA
AC not cold enough? Struggling with recurring indoor air quality problems? Get the answers you need when you work with our San Marcos, CA heating and air conditioning experts. We work with all makes and models of HVAC systems and offer full installations, repairs, and servicing to help you achieve your indoor comfort goals easily and efficiently.
Give us a call today to book an appointment for heating, air conditioning, or indoor air quality services in San Marcos, CA.



Peace of Mind Plumbing: Contact Our San Marcos Plumbers Today for Immediate Service
Plumbing problems can lead to water damage, structural damage, and high water bills. Don’t leave your plumbing concerns to just anyone. Call on the experts your neighbors have trusted since 1980. Thompson Plumbing Heating and Air Conditioning will get to the bottom of your plumbing issue and offer options for repair or replacement to help you enjoy long-term peace of mind. Reach out today to schedule trusted plumbing services in San Marcos, CA.
Call Now and Get Your Plumbing or HVAC Needs Resolved ASAP With Our San Marcos Professionals
The last thing you want to deal with is an AC problem or an unexpected plumbing leak. If you are having issues with your plumbing or HVAC system, don’t hesitate to reach out to our experts at Thompson Plumbing Heating and Air Conditioning for immediate service. We will have the problem identified and resolved in no time using safe, proven solutions.
Contact our experts today and schedule your next plumbing, heating, or AC service with us in San Marcos, CA or the surrounding area.
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Local Reviews
for San Marcos, CA
Review of gas dryer duct system
Lauri - San Marcos, CA 92078
Ramon was extremely knowledgeable and helpful with his evaluation. He couldn’t have been better. Thank you, Ramon!
Great and quick service
Bogdan - San Marcos, CA 92069
Great Service
Arun - San Marcos, CA 92078
Great service
Sandra - San Marcos, CA 92078
Ty was very polite and was good about telling us exactly what was wrong.
Excellent service!
Sue - San Marcos, CA 92078
Thompson Plumbing Heating and Air
Arun - San Marcos, CA 92078
Awesome! Ty takes care of me. He does a great job and very professional and down to earth. I asked him about cleaner air. He researched it and found me the I wave system and came out. Boom. Installed and done. He does the routine maintenance and explains everything to me. I appreciate it. It's good have a understanding of the job. I trust his opinion now. Thank you Thompson for sending me a great tech and taking care of me.
competence displayed
Angela - San Marcos, CA 92069
Ty performed his job efficiently and professionally, my AC runs better now than it has ever ran. Great Job!
Awesome
Arun - San Marcos, CA 92078
Ty is great and knows what he is doing.
Great Experience; AGAIN!
Andre - San Marcos, CA 92078
Recently our water heater’s pilot light went out. I knew how to re-light the pilot, but I didn’t plan on discovering a leak and an inch of water. Fortunately for me, I knew who to call: “Thompson Plumbing” and ask for Thomas! He is Great Plumber! He is Prompt, Professional, Knowledgeable, Efficient, Reliable, Dependable and Courteous. I know that my New Water Heater is Working Great and Installed “Expertly”. I will recommend Thompson to my Friends and call again, if the need arises. I hope it doesn’t, but I certainly know who to call.
Thompson Plumbing Outstanding Plumber: Thomas
A.K. Allen - San Marcos, CA 92078
I write reviews when they are deserved and this one is! Thomas B. Is a Professional, Courteous, Experienced Plumber who is a great Representative for Thompson Plumbing. He arrived on time well within the time frame. He explained his companies policies and took the time to listen to my concerns. He assessed my plumbing problem, quoted me a fair quote and he began. Regrettably the job turned out to be more challenging than expected, but he was not deterred. He kept me informed and he expertly remedied the problem. I was impressed with the: His Service, Knowledge, Expertise, Demeanor and Professionalism. I have found “My” Plumber! It is a relief to find a Reliable and Trustworthy Company. “Bravo Zulu, Thomas! (That’s Navy for Great Job!)
Kel R.
1479 sq ft 2 bath Kitchen/laundry/ ice maker box New line from service area with new shut off valve and regulator. Start point from the front of Garage( above ground piping) Not from meter and under ground piping. Single story 3 hose bibs. Pex piping Drywall patching, texturing or painting not included, client will take care of. New angle stops. Back to back bathrooms New moen posi temp shower valves. 2 year labor warranty from us and manufacture warranty of piping material. Installed new drain parts and basket strainer with new tail piece. 1 year parts and labor on the drain repair.



Will B.
Installed a quiet AC unit to the side of the house. The new furnace and coil was installed in the hallway attic to lower the sound in the house. Dampers where installed to help balance the airflow and a second return was installed to help with the return air sound.
Ignacio V.
Install new toilet and remove old toilet.
Ramon E.
Thompson replaced hot and cold laundry angle stops. Turned water back on. Checked for leaks. No leaks found. Took pictures. Cleaned up work area. Collected payment by credit.
Ramon E.
Upstairs master bathroom stand up shower is backed up. Ok per customer to cable drain. Thompson plumbing used 1/4” cable to break free drain stoppage. Ran water to test. Master bathroom shower drains fine for now. Cleaned up work area. Took pictures. Collected payment with cash.
Kel R.
Client provided installation of oil rubbed bronze Kohler Devonshire widespread faucet in master bathroom right side, 2 angle stops and 2 supply lines. Installed client supplied kitchen facet and island faucet.
Ty J.
Issue with the thermostat. Advised customer to send the nest he bought back and pick up a new one. Continue maintenance when thermostat is replaced
Garett B.
Found bad wet switch. Rewired the low voltage and tested
Ty J.
Heating maintenance. Inducer motor is making some noise most likely the wheel or bearings. Inducer motor amp draw is within range. Gas valve is over amping by .2 in the low stage. Air scrubber is no longer functioning.
Ignacio V.
Arrived at home and tested pressure. Pressure was at 65 psi.