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 15 customer reviews

Customers say: The reviews exhibit a positive sentiment, with a majority of customers expressing satisfaction with the services provided by Klaus & Sons. The recurring themes include praise for the quality of work, professionalism, reliability, and excellent customer service. Customers also appreciate the technicians' expertise, friendliness, and respect shown to senior women. The positive reviews highlight the company's efficiency, promptness, and ability to address various HVAC issues. Additionally, customers mention the company's commitment to using high-quality products and their willingness to go the extra mile to ensure customer satisfaction. Overall, the reviews convey a sense of trust and confidence in Klaus & Sons as a reliable and trustworthy HVAC service provider.

Our Local Reviews by City

Job Locations and Reviews

Heather P.
Heather P. Checked in
Within the hour. Spoke to Jack. He is hard of hearing so make sure to speak up. He has a faucet on-hand he would like you to install. Please provide pricing for approval before performing any work!!
Ontario, CA 91762
Heather P.
Heather P. Checked in
2 - 4 (REQ). Spoke to Michelle. In one bedroom bathroom, toilet not working anymore, more for handicap but they don't need that anymore. Wants it replaced with an ordinary toilet. Also in bathroom with two sinks, both sink faucets are dripping, would like to install new faucets. Please provide pricing for both of these before performing any work!!
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
Heather P.
Heather P. Checked in
10-12. COD. Call when in route (909) 261-6012. I spoke to Barbara, their toilet has a loose bolt that they cannot tighten and they need help fixing it.
Ontario, CA 91764
Heather P.
Heather P. Checked in
12-2. Text when in route. I spoke to Susan, their dishwasher line is backed up into the overflow.
Ontario, CA 91762
Heather P.
Heather P. Checked in
12-2. Text when in route. I spoke to Susan, their dishwasher line is backed up into the overflow.
Ontario, CA 91762
Heather P.
Heather P. Checked in
Gated community, code to type into call box: # 013, it will call her, and she will let you in.
Ontario, CA 91764
Review
Klaus & Sons very professional puts the customer needs first have used them for years
Linda - Ontario, CA 91761
Heather P.
Heather P. Checked in
(3-5 she said technically, the later the better) COD. Parts still under warranty, our old tech Tyler installed this in 2023. Spoke with Evelyn. She is not getting any hot water to her house. She's not sure if just the pilot is out or if there's something else wrong with her water heater. Please get approval on any pricing BEFORE performing any work, labor ONLY!
Ontario, CA 91764
Heather P.
Heather P. Checked in
Sewer back up. Roof access only
Ontario, CA 91761
Heather P.
Heather P. Checked in
(12-2) COD. Spoke with Michelle, please call her on arrival so she can open up her gate for you (909) 731-8831. Their toilet is clogged up and they would like to get the drain cleared. Please get approval on any pricing BEFORE performing any work! Will be asking about a senior discount (10% OFF, cap at $25.00) or a courtesy service since they are loyal customers (we have only been out about 5 times to this address before, since 2022 🙄🙃)
Ontario, CA 91764
Heather P.
Heather P. Checked in
(12-2) COD. Spoke with Michelle, please call her on arrival so she can open up her gate for you (909) 731-8831. Their toilet is clogged up and they would like to get the drain cleared. Please get approval on any pricing BEFORE performing any work! Will be asking about a senior discount (10% OFF, cap at $25.00) or a courtesy service since they are loyal customers (we have only been out about 5 times to this address before, since 2022 🙄🙃)
Ontario, CA 91764
Heather P.
Heather P. Checked in
8 - 12. Spoke to Larry. He would like a PM on his HVAC unit - BOTH furnace & AC. Also sent him the service agreement, if he signs up beforehand, need to add it to this ticket and it will be his first visit. If not, it will be $257.
Ontario, CA 91761
Heather P.
Heather P. Checked in
8 - 12. Spoke to Larry. He would like a PM on his HVAC unit - BOTH furnace & AC. Also sent him the service agreement, if he signs up beforehand, need to add it to this ticket and it will be his first visit. If not, it will be $257.
Ontario, CA 91761
Heather P.
Heather P. Checked in
2 - 4. Per Jake: Customer's parts are in, coming back for repair. Added line item to invoice from last job.
Ontario, CA 91764
Heather P.
Heather P. Checked in
(within the next 30 minutes!) Net 30. Spoke with Maria. She said that they have a clogged bathtub. Please get approval on pricing from Maria (909) 986-7973 BEFORE performing any work!
Ontario, CA 91762
Heather P.
Heather P. Checked in
8 - 10 (REQ DAY). COD. Spoke to Linda. First time customer. Leak in pipe in front of home – Think it’s in the rose bed, might be the turn off valve for the house. Also, would like you to check out back of house as well – said it's a similar leak but isn’t in the sprinkler system, it's a pipe near the house.
Ontario, CA 91762
Heather P.
Heather P. Checked in
8 - 10 (REQ DAY). COD. Spoke to Linda. First time customer. Leak in pipe in front of home – Think it’s in the rose bed, might be the turn off valve for the house. Also, would like you to check out back of house as well – said it's a similar leak but isn’t in the sprinkler system, it's a pipe near the house.
Ontario, CA 91762
Heather P.
Heather P. Checked in
10-12. COD. CC on file. Call Suzanne when in route (323) 975-1188. Also make sure to call her when you have summary of findings to get approval for work. There is a leak in the ceiling downstairs and there is a shower that is right above it that they think is causing it.
Ontario, CA 91761
Heather P.
Heather P. Checked in
(3-5) COD. Spoke with Robin. She's not sure, but it seems like the washing machine line is backing up into her shower. Please get approval on any pricing BEFORE performing any work!
Ontario, CA 91764
Heather P.
Heather P. Checked in
8 - 12. SA MEMBER VISIT #1. AC & FURNACE PM. ALREADY PAID FOR THIS VISIT.
Ontario, CA 91762
Heather P.
Heather P. Checked in
Ontario, CA 91762
Heather P.
Heather P. Checked in
Ontario, CA 91762
Heather P.
Heather P. Checked in
Ontario, CA 91762
Heather P.
Heather P. Checked in
10 - 12. Spoke to Martha. She needs her kitchen sink snaked via cleanout. Also, has a constantly running toilet, been going on for about 6 months but she didn't have the funds to fix it, would like it fixed now.
Ontario, CA 91764
Review
Mario did a great job on clearing my clogged kitchen sink drain.
Martha Logan - Ontario, CA 91764
Heather P.
Heather P. Checked in
10-12. Time requested. COD. I spoke to Emily property manager (626) 536-8631. The toilet is not draining properly, they put draino and it is not going down at all. They want to know what is causing the back up to occur. They received an estimate for a new toilet but they do not want that they want to know what is causing the blockage.
Ontario, CA 91762
Heather P.
Heather P. Checked in
10 - 12. Spoke to Martha. She needs her kitchen sink snaked via cleanout. Also, has a constantly running toilet, been going on for about 6 months but she didn't have the funds to fix it, would like it fixed now.
Ontario, CA 91764
Review
Great service!!!
Mish - Ontario, CA 91764
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
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