Ontario, CA

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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 13 customer reviews

Customers say: The provided content describes the overall sentiment of the reviews as positive. The reviews consistently mention positive experiences with the company, praising their communication, professionalism, quality of work, and timely completion of projects. Customers express satisfaction with the company's ability to handle various plumbing issues, their friendly and knowledgeable staff, and their commitment to customer satisfaction. There are also mentions of competitive pricing and the company's reputation for excellence. However, there are a few negative reviews that mention issues with pricing and a lack of resolution for some plumbing problems. Overall, the sentiment is positive, with more positive reviews outweighing the negative ones.

Our Local Reviews by City

Job Locations and Reviews

Heather P.
Heather P. Checked in
10 - 12 (REQ DAY & TIME). Spoke to Michelle & husband. Their AC compressor fan not working, said that little fan motor needs to be replaced. 1 tenth of a horsepower motor, runs on 208 or 220. I did let him know it is $158 to diagnose the issue, and we will give them an estimate on the motor/findings. He asked if you would have the motor and capacitor on hand, I said you have a well-stocked truck but might have to order the motor depending on the diagnostic. Or if you have this one in stock you can bring it.
Ontario, CA 91762
Heather P.
Heather P. Checked in
Sending Ryan from Serv pro as customer has mildew smell
Ontario, CA 91762
Heather P.
Heather P. Checked in
(8-10) COD. Spoke with Ryan. He thinks he needs his kitchen valve replaced. He says it's not really opening up, just letting out a trickle. Please get approval on any pricing BEFORE performing any work!
Ontario, CA 91762
Review
Fast service! Had my broken pipe fixed within an hour after I called!
Kaydee - Ontario, CA 91762
Heather P.
Heather P. Checked in
5-7. Text when in route. Time requested. Will not be home until 5. I spoke to Kaydee, her kid was playing in the front yard and they managed to break a pipe and now they are not getting any water in their home.
Ontario, CA 91762
Heather P.
Heather P. Checked in
Per Amen, Geo-logic still have issues with Sloan valve.
Ontario, CA 91761
Heather P.
Heather P. Checked in
2-4. Requested Amen. I spoke to Jeannette, call her at 909-578-2397 when you know what is going on. They have another leak that they want Amen to take a look at.
Ontario, CA 91761
Heather P.
Heather P. Checked in
8 - 9 arrival time. Customer approved estimate! ALL DAY job per Mario.
Ontario, CA 91761
Heather P.
Heather P. Checked in
8 - 9 arrival time. Customer approved estimate! ALL DAY job per Mario.
Ontario, CA 91761
Heather P.
Heather P. Checked in
10-12. Amen only. Time requested. Jeannette emailed in, call her at 909-578-2397 when you know what is going on. They had the urinal repaired in February with Amen and it is running constantly and does not shut off.
Ontario, CA 91761
Heather P.
Heather P. Checked in
10-12. Amen only. Time requested. Jeannette emailed in, call her at 909-578-2397 when you know what is going on. They had the urinal repaired in February with Amen and it is running constantly and does not shut off.
Ontario, CA 91761
Heather P.
Heather P. Checked in
10-12. Amen only. Time requested. Jeannette emailed in, call her at 909-578-2397 when you know what is going on. They had the urinal repaired in February with Amen and it is running constantly and does not shut off.
Ontario, CA 91761
Heather P.
Heather P. Checked in
Within the next half hour to an hour. Cheryl Gale CIP real estate emailed in. Spoke to Damien to schedule - (POC) - 775-515-9603. "We have another hose bibb leaking (inside a warehouse) at Milliken. The address is 4385 E. Lowell, Suite B, Ontario. I understand that the water has leaked into the neighboring suite, causing damage, so the sooner the better." CALL CHERYL WITH FINDINGS AND APPROVAL! (909) 949-2080
Ontario, CA 91761
Heather P.
Heather P. Checked in
8-12. Call Maria (909) 268-8791 when you have an idea of what is going on. I spoke to Maria, the units thermostat is blank and not working and the ac is not turning on due to it. I did mention the $158 diagnostic.
Ontario, CA 91762
Heather P.
Heather P. Checked in
Now (within next 30 minutes). Spoke to Frank from Hawes prop mgmt. This property has a potential main line clog, they tried to unclog it the easy way didn't work, they think it's the main line but not sure. Tenant at property is Brenda Castillanos - (909)-261-6805. Frank's contact - (909)-985-9796, PLEASE CALL HIM WITH FINDINGS AND FOR APPROVAL FOR ANY WORK!
Ontario, CA 91762
Heather P.
Heather P. Checked in
Customer will be sending check through mail
Ontario, CA 91762
Heather P.
Heather P. Checked in
Customer will be sending check through mail
Ontario, CA 91762
Heather P.
Heather P. Checked in
10-12. Requested Wes. COD. I spoke to John, (909) 917-6632 call when in route. They want to get a hydrojet done with Wes, he said Wes was familiar with the facility.
Ontario, CA 91761
Heather P.
Heather P. Checked in
10 - 12. NET30. Spoke to Natalie at KNL Group. Needs toilet secured and new wax rings installed at this property.
Ontario, CA 91761
Heather P.
Heather P. Checked in
10 - 12. NET30. Spoke to Natalie at KNL Group. Needs toilet secured and new wax rings installed at this property.
Ontario, CA 91761
Heather P.
Heather P. Checked in
2-4. COD. Text when in route. I spoke to Greg, their is a toilet that is backed up and not draining down at all.
Ontario, CA 91762
Heather P.
Heather P. Checked in
8-10. COD. Call when in route. I spoke to Angie, they have low water pressure through the entire home all of a sudden and they're not sure why.
Ontario, CA 91761
Heather P.
Heather P. Checked in
8-10. COD. Call when in route. I spoke to Angie, they have low water pressure through the entire home all of a sudden and they're not sure why.
Ontario, CA 91761
Heather P.
Heather P. Checked in
10-12. COD. Text when in route. Time requested. I spoke to Teresa, they had work done by another company and she said it wasn't done well and she wants to have the work inspected, did not mention a price, let her know that tech would provide pricing for inspection. She also wants to have some plumbing redone under her bathroom sink, there was ANOTHER contractor that did work there last year but she said that the water smells when its used there.
Ontario, CA 91762
Review
Recommend to others anytime
Linda - Ontario, CA 91761
Heather P.
Heather P. Checked in
Mainline from roof vent
Ontario, CA 91761
Heather P.
Heather P. Checked in
10 - 12. Spoke to Olivia. Insurance company came out and said that she needs 2 straps installed on w/h. We installed it back in 2022. Please provide quote before performing any work!!
Ontario, CA 91764
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
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