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
Customers say: The reviews exhibit a positive sentiment overall, with a slight inclination towards the positive. The recurring themes include praise for the company's responsiveness, professionalism, and quality of service. Customers express gratitude for the prompt attention, efficient repairs, and friendly technicians. The company's reputation for reliability and excellent customer service is consistently highlighted. However, there are a few negative reviews that mention pricing concerns, although they are less frequent. Overall, the reviews suggest that Klaus & Sons Plumbing & Heating provides reliable and satisfactory plumbing services, with a focus on customer satisfaction and quality workmanship.
Our Local Reviews by City
- Chino, CA (5)
- Chino Hills, CA (3)
- Claremont, CA (24)
- Covina, CA (1)
- Diamond Bar, CA (2)
- Fontana, CA (3)
- Glendora, CA (2)
- La Verne, CA (4)
- Monrovia, CA (1)
- Montclair, CA (2)
- Ontario, CA (10)
- Pomona, CA (8)
- Rancho Cucamonga, CA (21)
- San Dimas, CA (2)
- South Pasadena, CA (1)
- Upland, CA (47)
Job Locations and Reviews
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
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8-12. COD. Text when on the way. I spoke to Ben, the shower handle is leaking a ton and they need to get it fixed.
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(12-2) Net 30. PLEASE CALL RANDY WHEN YOU'RE ABOUT 15-20 MINS OUT (909) 331-6470! Per Jesse, he has a clogged condensate line.
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12 - 2. COD. Spoke to Carolyn. Has a clogged-up toilet, noticed it last night around 11pm. She would also like to discuss options for a new toilet while you are there 🙂
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10 - 12. For Andrew per Jesse. CALL GABE WHEN ON THE WAY!!! - (909) 260-5436. Hydro jetting.
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8-10. Requested Andrew. COD. I spoke to Gilbert they had Andrew out last week for one shower that was leaking and now the other one is leaking and they would like to have it fixed.
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Toilet issue
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Now. Spoke to son Paul but Steve was there as well. Said that his Dads’ water heater stopped working. We installed it but way back in the day, I don't even have history on it. Said might be the pilot or ignitor? Please check out, provide quote before performing any work!
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8 - 10. NET30. Spoke to Mike. Suite 3. One of the connectors going to urinal has a very small leak, drips here and there. Mike will be on-site.
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(2-4 REQ) COD. Spoke with Taotao. The red light on his water heater kept blinking so he turned it off, but now the water heater won't turn back on. He currently has NO HOT WATER to his home. He would like to get an estimate fore repair or replacement to get his water heater up and running. Please get approval on any pricing BEFORE performing any work!
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1 - 3. Spoke to Paul. Call when on the way please!!! - (626) 991-3100. He had a capacitor replaced on AC last summer, once capacitor was replaced, took a while to get up and running, last person who worked on AC suggested he have some sort of tune-up done. He thinks the condensation is clogged, so please check that out while there. He wanted an all-in-one type of service done, tune-up done and connect PVC pipe to sewer line. I let him know that we can send an HVAC tech out and if the drip is not related to the AC, we will have to send a plumbing tech out instead. YOU WILL NEED A LONG LADDER TO GET TO SECOND LEVEL OUTSIDE.
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1 - 5. Spoke to Nancy. Having thermostat issues and says that AC hose split, and you can see the wires. David don't forget to pick up estimate from window!! Also, she was asking if this is free of charge.
They are always efficient, has great customer service, and I don't feel ripped off
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8 - 10. Had to reschedule to Monday because HOA turned water off on Friday.
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This is Michael Gallo’s mother’s rental. Leak under sink drain
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8-10. COD. Text (951) 533-6579 when in route. I spoke to Brianna, she is Julies wife, they have a leak somewhere in their front yard, they notice the water all over and want to address it before it becomes a bigger issue.
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8-10. COD. Call when in route. I spoke to Paul, he is calling for his daughters house she did give approval. The garbage disposal is an insinkerator and stopped working and needs to be fixed.
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3 - 5 (TIME REQ). Please call when on the way!!! - (858) 451-2934. Spoke to Damien. We installed the hvac unit about 5 years ago, has a google nest, heater not kicking on as of this morning.
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2-4. NET 30. I spoke to Robert (909) 740-4912, he is Sharon Poultons husband and he will be the point of contact to get approval for work, CALL BEFORE DOING ANYTHING TO GET APPROVAL. The water heater pilot light is not lighting at all and they are not sure of the age but said it is very old and may need to be replaced.
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1-3. COD. Call when in route. I spoke to Doug, their laundry room that needs to be cleared out.
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Per Courtney "Within the next 30 minutes. Spoke to Cesar. This is for the church: Clogged sink, coming out floor drain. They like to have an estimate and invoice, so fill out estimate first, have it approved and then perform work same day, send Cesar invoice. " Also Cesar would like a faucet to be looked at that leaks when it is used.
The Tech was good fixed the problem. Price was high but that is with all services these days.
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(909) 800-1174. CALL WHEN IN ROUTE. SISTER YOLAND WILL BE THERE ON SITE INSTEAD, IF CLEMENT APPROVES HE HAS TO PUT A CARD ON FILE.
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(8-10) COD. Spoke with Gilbert. He said that his master bathroom's showerhead is constantly dripping and he can't get it to shut off properly. They would like to get an estimate for repair or replacement. Please get approval on pricing BEFORE performing any work!
Very knowledgeable and professional service
The technician was very helpful and addressed the issue quickly.
Great communication, they were able to replace my water heater same day!
Thank you so much for taking the time to leave an excellent rating. We really appreciate your business.
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.
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.
Couldn’t ask for better service!!
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
David was prompt, knowledgeable, and fixed our AC quickly. Very professional and friendly.