Ontario, CA

Contact Us

Ontario Plumbing, Heating & Air Conditioning Experts

Full Plumber Services In & Around Ontario

Ontario is one of the oldest communities in the Inland Empire. So much of Ontario has unique, historical homes and buildings. A special city needs a special plumber that can service, replace and help you maintain all the plumbing in your home – old or new. At Klaus & Sons, a trusted name in the industry, we’re proud to bring our expertise from Montclair, CA, to serve the thriving community of Ontario. With years of experience, we are committed to providing exceptional heating, cooling, and plumbing solutions to residents and businesses in Ontario.

Give us a call 909-982-5698 or fill out our contact form for immediate assistance.

Emergency Plumbing:

For those unexpected plumbing emergencies, Klaus & Sons is here to provide prompt and reliable emergency plumbing services. We understand that issues can arise at any time, and our experienced team is ready to assist you 24/7.

Air Conditioning Installation and Repair:

When the summer heat sets in, having a reliable air conditioning system is essential. Our team specializes in the installation and repair of energy-efficient AC units, ensuring you stay cool and comfortable when the temperatures rise. We’re here to make your home a haven from the summer sun.

Heating Installation and Repair:

Stay warm and cozy during the colder months with our expert heating installation and repair services. Whether you need a new heating system installed or require prompt repairs to your existing one, Klaus & Sons has you covered. Our skilled technicians ensure your home remains comfortable year-round.

Residential Plumbing Services:

From routine maintenance to complex plumbing issues, Klaus & Sons is your trusted partner for all your residential plumbing needs. Leaky faucets, clogged drains, and more – we’ve got the solutions to keep your water systems flowing smoothly.

Water Heater Repair & Replacement:

Our expert technicians are skilled in water heater repair and replacement services. We ensure your hot water needs are met, providing you with reliable access to hot water whenever you need it.

Why Choose Klaus & Sons:

  • Experienced Team: Our skilled technicians are highly trained and experienced in the HVAC and plumbing fields. You can trust us to provide efficient and reliable services.
  • Customer-Centric Approach: We value your satisfaction and work closely with you to meet your specific needs and budget.
  • Quality Products: We use top-quality products and materials, ensuring the longevity and effectiveness of our installations and repairs.
  • Emergency Services: We understand that heating, cooling, and plumbing issues can arise at any time. Our emergency services are available 24/7 to address urgent problems promptly.

Contact Us:

When you choose Klaus & Sons, you’re choosing excellence in HVAC and plumbing services. We’re dedicated to ensuring the comfort and functionality of your Ontario, CA property. For reliable, professional, and friendly service, contact us today at 909-982-5698 to schedule an appointment or request a quote. Klaus & Sons is here to make your life more comfortable, one service at a time.

Call 909-982-5698 the professional HVAC technicians at Klaus & Sons Plumbing Heating & Air Conditioning in Ontario, CA today for air conditioning service or a free estimate! 

Recent Jobs and Reviews in Ontario, CA

Rated 4.9 out of 5 stars based on 34 customer reviews

Customers say: The reviews exhibit a positive sentiment towards Klaus and Sons Plumbing. Customers express satisfaction with the service technicians' punctuality, professionalism, and ability to resolve plumbing issues accurately and efficiently. Positive reviews highlight the technicians' knowledge, friendliness, and the quality of the work performed. Customers also appreciate the company's reliability, promptness, and reasonable pricing. The recurring themes in the reviews include prompt arrival, effective problem-solving, professionalism, and satisfaction with the services provided. However, there are a few negative reviews that mention issues with punctuality, but they are outweighed by the positive experiences shared by the majority of customers. Overall, the sentiment is positive, with customers expressing gratitude and satisfaction with Klaus and Sons Plumbing's services.

Our Local Reviews by City

Job Locations and Reviews

Heather P.
Heather P. Checked in
(4-6) COD. Spoke with Kim. She said that her T-stat is completely blank, no display at all. She asked for help from the contractor in the backyard doing work on her pool, but they found that her breakers are NOT tripped, since her garage refrigerator is working just fine. She is aware of the $158 diagnostic fee. Please get approval on any other pricing BEFORE performing any work!
Ontario, CA 91762
Heather P.
Heather P. Checked in
8 - 10. COD (only NET30 if CIP is paying/main line issue, but please collect with tenant on-site!). Please call Alex if we can come sooner!! - 626 498 9205. This is for Suite G Personale Staff. Pipe issues, tried snake and other things but toilet not working at all. Started about 2 days ago. Spoke to Cheryl (prop management), she said tenants will be taking care of this UNLESS it's a main line issue. If main line issue or have any questions you can call or text Cherly at (909) 214-4948. If not, get approval and payment from tenants. Please provide pricing first! Alex will be on-site.
Ontario, CA 91761
Review
Great service
William - Ontario, CA 91761
Heather P.
Heather P. Checked in
1 - 5. SA member second visit. Please provide maintenance on both furnace & AC. HE WILL BE CHARGED FOR MEMBERSHIP FOR THIS ON JULY 14, HE CONFIRMED THAT'S OKAY.
Ontario, CA 91761
Heather P.
Heather P. Checked in
8-12. COD. Call when in route. I spoke to Chris, they have a thermostat on hand that they need to have installed.
Ontario, CA 91764
Heather P.
Heather P. Checked in
8-10. COD. Call when in route. I spoke to Marilyn. The code for the lock is 663521 tankless water heater needs to be serviced. Quoted $250.
Ontario, CA 91761
Heather P.
Heather P. Checked in
Moved to 2-4. Do not move again
Ontario, CA 91762
Heather P.
Heather P. Checked in
Moved to 2-4. Do not move again
Ontario, CA 91762
Heather P.
Heather P. Checked in
2-5. COD. I spoke to Joanie, they need a 40 gallon water heater, the current one is 50 gallons and just went out and needs replacing.
Ontario, CA 91762
Heather P.
Heather P. Checked in
10 - 12. NET30. Spoke to Cesar. 2 plumbing issues need to be addressed: 1) staff restroom sink is leaking 2) inside classroom water fountain is leaking. Both slow leaks. Contact Cesar at - (323) 236-5453 and send over estimate to email on file for approval. They require estimates before performing work so please provide estimate first and have them approve it before preforming any work!
Ontario, CA 91764
Review
Mario came by to check the water pressure on the house and as usual he was awesome. Thank you very much for all your help Mario keep up the great work.
Rochelle - Ontario, CA 91764
Review
Arrived on time, Mario was both informative and helpful.
Jack - Ontario, CA 91762
Review
Repairman always on time and does a quality job
Earl - Ontario, CA 91764
Review
Always use Klaus and Sons when I have plumbing problems.
Tena - Ontario, CA 91762
Review
On time. Courteous. Knowledgeable. Efficient.
Karen - Ontario, CA 91764
Review
Did a good job
Leo - Ontario, CA 91762
Review
On-time, friendly, communicative and professional service- excellent!
Harold - Ontario, CA 91762
Review
Our shower was clogged. We called and were scheduled for the same day. The plumber was courteous, clean and friendly. he did the job and did not leave a mess for us to clean up. Great job. Thank you
Matt - Ontario, CA 91762
Review
great service
Jackie - Ontario, CA 91764
Review
Excellent technician.
Terry - Ontario, CA 91762
Review
Quick professional service, from the person who took the request on phone to the service technician. Great service!
Lupe - Ontario, CA 91762
Review
Got the problem fixed on a reasonable amount of time clean job technician was very knowledgeable and courteous
Jacob - Ontario, CA 91764
Review
Heather; every time we've been serviced by your company Klaus n' Sons ! You've always been the greatest ! We've tried other companies because of scheduling issue on our part ! Not yours! Don't come close to!! We appreciate you guys !! When I call to schedule ; the girls are the best very attentive and knowledgeable to our concerned!! Soo to your well organized company ! Thank yu very much!! Sergio
Sergio - Ontario, CA 91764
Response from Klaus & Sons Plumbing, Heating & Air Conditioning:

We're thrilled to hear that our heating and cooling service exceeded your expectations. Thanks for the kind words!

Review
The service was excellent and serviceman David was awesome.
Guy - Ontario, CA 91761
Response from Klaus & Sons Plumbing, Heating & Air Conditioning:

Thank you so much for taking the time to leave us this amazing review!

Review
When I called Klaus and Sons, Heather answered and was so friendly, courteous and helpful! She listened to my tale of woe about the leak and she scheduled an appointment the next morning. She later checked with me about a minor schedule adjustment with Wes, who did a fantastic job fixing the leak!! I hope I don't have future plumbing issues but when I do, I will call Klaus and hope to speak to Heather!
Rosemarie - Ontario, CA 91762
Review
Great timely service, polite and on time. Thanks
Bryan - Ontario, CA 91764
Review
Justin did an excellent job fixing our burst pipe. He got to our house quickly and got the job done fast. We would definitely recommend this business.
Teresa - Ontario, CA 91762
Review
Wes and his team did a great job!!!
Ken - Ontario, CA 91762
Review
Tech was early assessed the problem and got to work. Was done in no time. Left the work area very clean Andrew was our tech he always does a great job. Glad to have him any time.
Barbara - Ontario, CA 91764
Review
Klaus & Sons very professional puts the customer needs first have used them for years
Linda - Ontario, CA 91761
Review
Mario did a great job on clearing my clogged kitchen sink drain.
Martha Logan - Ontario, CA 91764
Response from Klaus & Sons Plumbing, Heating & Air Conditioning:

We thank you for sharing your positive experience. It made our day.

Review
Great service!!!
Mish - Ontario, CA 91764
Response from Klaus & Sons Plumbing, Heating & Air Conditioning:

We are so grateful for your 5-star review. Thanks for sharing your rating with us and the community.

Review
Fast service! Had my broken pipe fixed within an hour after I called!
Kaydee - Ontario, CA 91762
Review
Recommend to others anytime
Linda - Ontario, CA 91761
Review
On time. Quick installation Have trusted Klaus & Sons for over 40 years.
Earl - Ontario, CA 91764
Response from Klaus & Sons Plumbing, Heating & Air Conditioning:

Thank you so much for your 5-star review! We will share this with the team to let them know to keep up the amazing work!

Review
They are always efficient, has great customer service, and I don't feel ripped off
Angel - Ontario, CA 91762
Trusted Quality &
Service
  • Lenox Logo
  • Upland Chamber Of Commerce
  • Nate Certified Badge
  • Google Guarnatee Badge
  • Bbb A Plus Accredited Buisness
Gravity Forms Pagination Must be Steps