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 5.0 out of 5 stars based on 24 customer reviews

Customers say: The reviews exhibit a positive sentiment towards Klaus & Sons Plumbing, with many customers expressing satisfaction with their services. The positive reviews highlight the company's quick response, professionalism, and quality of work. Customers appreciate the technicians' knowledge, friendliness, and efficiency, with many mentioning their willingness to go above and beyond to ensure customer satisfaction. Additionally, customers praise the company's reliability, competitive pricing, and the ability to handle various plumbing issues. Negative reviews are present but are outweighed by the positive ones. However, the negative reviews mainly focus on specific incidents or experiences, with some customers expressing dissatisfaction with the initial service or the resolution of the issue. Overall, the reviews suggest that Klaus & Sons Plumbing provides reliable and high-quality plumbing services, with a majority of customers expressing satisfaction with their experiences.

Our Local Reviews by City

Job Locations and Reviews

Heather P.
Heather P. Checked in
Ontario, CA 91764
Heather P.
Heather P. Checked in
9 - 12 (TIME AND DAY REQUEST). SA member second visit. FERNANDO ONLY (REQ). ALREADY PAID. Please service both furnace and AC. Bring filter to change out!!!
Ontario, CA 91764
Ontario, CA - If authorized bring coil clean, 21x21x1 cut to fit washable reusable filter and a 50/7.5 440v start component
Heather P.
Heather P. Checked in
If authorized bring coil clean, 21x21x1 cut to fit washable reusable filter and a 50/7.5 440v start component
Ontario, CA 91762
Ontario, CA - 10 - 12 (TIME AND DAY REQ). Spoke to Maria. Water meter leaking needs to be replaced, meter will be provided just needs to be swapped out for new one at SPC D10. Water meter will be outside of office.
Heather P.
Heather P. Checked in
10 - 12 (TIME AND DAY REQ). Spoke to Maria. Water meter leaking needs to be replaced, meter will be provided just needs to be swapped out for new one at SPC D10. Water meter will be outside of office.
Ontario, CA 91762
Ontario, CA - 10 - 12 (TIME AND DAY REQ). Spoke to Maria. Water meter leaking needs to be replaced, meter will be provided just needs to be swapped out for new one at SPC D10. Water meter will be outside of office.
Heather P.
Heather P. Checked in
10 - 12 (TIME AND DAY REQ). Spoke to Maria. Water meter leaking needs to be replaced, meter will be provided just needs to be swapped out for new one at SPC D10. Water meter will be outside of office.
Ontario, CA 91762
Heather P.
Heather P. Checked in
1 - 5. Spoke to Natalie. Ac annual maintenance. Quoted $158.
Ontario, CA 91761
Heather P.
Heather P. Checked in
8 - 12 arrival. DAY REQUESTED. SEND EVAN AS A HELPER PER DAN.
Ontario, CA 91764
Heather P.
Heather P. Checked in
8-12. Per Jesse open call for Ryan with Servpro. Install 3 faucets and hook up sinks.
Ontario, CA 91761
Heather P.
Heather P. Checked in
Per Mario open up ticket as he did work for homeowner as well as Servpro.
Ontario, CA 91761
Heather P.
Heather P. Checked in
(12-2) COD. Sal ONLY. Spoke with Richard, They accepted Sal's estimate for installing a customer supplied kitchen faucet, $289. Per Sal, will need 2 hr timeframe to complete
Ontario, CA 91761
Ontario, CA - 10-12. COD. CC on file. Ask for Matt when arriving he is the manager. I spoke to Matt, they have a toilet that needs to be replaced, the previous ones water line broke and caused some damage.
Heather P.
Heather P. Checked in
10-12. COD. CC on file. Ask for Matt when arriving he is the manager. I spoke to Matt, they have a toilet that needs to be replaced, the previous ones water line broke and caused some damage.
Ontario, CA 91764
Ontario, CA - 10-12. COD. CC on file. Ask for Matt when arriving he is the manager. I spoke to Matt, they have a toilet that needs to be replaced, the previous ones water line broke and caused some damage.
Heather P.
Heather P. Checked in
10-12. COD. CC on file. Ask for Matt when arriving he is the manager. I spoke to Matt, they have a toilet that needs to be replaced, the previous ones water line broke and caused some damage.
Ontario, CA 91764
Heather P.
Heather P. Checked in
1 - 5. Had to reschedule due to Raul coming in later on Thursday. DO NOT RESCHEDULE AGAIN.
Ontario, CA 91764
Heather P.
Heather P. Checked in
Within the hour. COD. Spoke to Susan. This is for Johnson Marine Supplies. Susan will be on-site. They have a broken pipe on outside of building that has been repaired before. Turned water off over weekend. Please check this out and provide pricing for repair!!
Ontario, CA 91762
Heather P.
Heather P. Checked in
2-4. COD. I spoke to Jim, the unit washer line has a nasty fishy odor when its ran and they're not sure what the cause of it is.
Ontario, CA 91764
Heather P.
Heather P. Checked in
2-4. COD. I spoke to Jim, the unit washer line has a nasty fishy odor when its ran and they're not sure what the cause of it is.
Ontario, CA 91764
Heather P.
Heather P. Checked in
4 - 5 (TIME REQ, sorry 🥲). Spoke to Krystyna. Underneath sink issue, goes on and off, not sure where leak is coming from but found flooded bottom cabinet, sometimes leaks and sometimes doesn't. Please check out and provide pricing before preforming any work!
Ontario, CA 91764
Review
Excellent technician.
Terry - Ontario, CA 91762
Heather P.
Heather P. Checked in
$260
Ontario, CA 91762
Heather P.
Heather P. Checked in
(3-5) COD. Spoke with Janice. She tried to change the batteries on her thermostat but now it's not working. She's also not sure if she put in the batteries correctly. She is aware of the $158 service fee.
Ontario, CA 91764
Heather P.
Heather P. Checked in
Within the hour. COD. Spoke to Susan. This is for Johnson Marine Supplies. Susan will be on-site. They have a broken pipe on outside of building that has been repaired before. Turned water off over weekend. Please check this out and provide pricing for repair!!
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
Heather P.
Heather P. Checked in
8 - 10. COD. Spoke to Lupe. Basin/sink in bathroom has issue, double sink, when turning on both faucets, it hammers and loses water pressure. First time customer. Please provide pricing before performing any work!!!
Ontario, CA 91762
Heather P.
Heather P. Checked in
1- 5. COD. Card on file. Spoke to Helen. PLEASE CALL TENANT SELENA WHEN AN HOUR OUT - (909) 336-4014. Tenant saying ac not cooling, turns on but not cooling well, house gets really hot. Call to confirm findings and pricing with homeowner Helen - (714) 721-0911. Quoted her $158 for diagnostic, she confirmed. She has a card on file, but please confirm beforehand if she would like to charge card at end after providing pricing/service.
Ontario, CA 91764
Heather P.
Heather P. Checked in
2 - 4. COD. Spoke to John. Industrial building toilet not working, might need rebuild kit. One toilet in men's restroom in plant. He said he will need the work done so please bring the parts!! Provide pricing before performing any work, John will be on-site.
Ontario, CA 91761
Heather P.
Heather P. Checked in
12 - 2 (TIME REQ). Spoke to Richard. Needs work done on 2 sinks in house: main kitchen sink has been leaking quite a while, not sure if needs to replace whole unit or if it's repairable. Utility room sink needs new insert, he has the insert on-hand just needs to be installed. Please provide pricing before preforming any work!!
Ontario, CA 91761
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:

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:

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:

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

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

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:

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
Review
The Tech was good fixed the problem. Price was high but that is with all services these days.
GSR - Ontario, CA 91761
Review
Very knowledgeable and professional service
Terry - Ontario, CA 91762
Review
The technician was very helpful and addressed the issue quickly.
Doreen - Ontario, CA 91761
Review
Great communication, they were able to replace my water heater same day!
Bryan - Ontario, CA 91762
Response from Klaus & Sons:

Thank you so much for taking the time to leave an excellent rating. We really appreciate your business.

Review
Service was excellent but the pricing is outrageous. I provided the faucet, Jake was here for approximately 2 hours and the bill was $739.74. That is over $350.00 an hour. Can you please doublecheck the bill and verify that that $739.74 is correct.
Mary - Ontario, CA 91761
Review
James did a nice job on a long overdue new Moen kitchen faucet installation. A ceramic disc cartridge is the way to go with today's modern faucets especially if you have hard water. They're easy to install, but my arthritic body said let Klaus & Sons do it. They stock and install new water heaters, but for faucets or utility sinks you must purchase elsewhere and they'll install it for you.
Patrick - Ontario, CA 91764
Review
Couldn’t ask for better service!!
Greg - Ontario, CA 91764
Review
Klaus and Sons gives over and beyond the service that is needed The technicians involved are always informative and very productive You can't go wrong with Klaus & Sons
Linda - Ontario, CA 91761
Review
David was prompt, knowledgeable, and fixed our AC quickly. Very professional and friendly.
RUDOLPH/ - Ontario, CA 91761
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