Klaus & Sons Plumbing
Heating & Air Conditioning

(909) 982-5698


Klaus & Sons are your local licensed and insured (CSLB #320990) family-owned Upland plumbing, heating and air-conditioning experts. We provide local residential and commercial HVAC (Heating, Ventilation and Air-Conditioning) and plumbing services 24 hours a day by expert, trained technicians.

 Knowledgeable, Friendly Office Staff

Along with our experienced technical staff, we have a courteous and professional office that can answer questions and help you with all your service, maintenance and installation needs.

We repair all brands, makes and models of HVAC equipment.

Upland Air Conditioning
Heating & Plumbing Since 1973

Klaus & Sons has been serving Upland and the surrounding communities for over four decades. We pride ourselves on providing every customer an excellent experience.


Special Offers

 Free Nest Thermostat


Your 24-Hour Emergency Plumber & HVAC Service Experts

Commercial and Residential Service
Free HVAC Estimates
Free Air-Conditioning, Plumbing & Heating Estimates
Utility Bills Savings
Hero Program Financing
Energy Upgrade California Rebates
Energy-Efficient Upgrades


 An Upland Plumber You Can Count On!

24 Hour Emergency Plumbing Services
Help You Save Water & Lower Utility Bills
Plumbing Repairs – Large or Small
 Service and Repair Gas Water Heaters •  Re-Light Water Heater Pilot Light
Backflow Prevention Experts
Leaking Pipe Detection
Pipe Camera Inspections •  Sewer Inspection Camera
Pressure Regulators

No Hot Water? No Water Pressure?
Call (909) 982-5698

Water Heaters •  Tankless Water Heaters
Tub and Toilet Repairs/Replacements • Toilet Tank Repair and Installation
Sink and Faucet Repairs/Replacements
Hot Water Dispenser
Drain Cleaning
Outdoor Plumbing
Whole House Re-Piping • 


Upland Air Conditioning Installation & Repair Experts

Attic Insulation
Install Digital Thermostat
Wi-Fi Thermostat Install
Humidifier Installation
Split System Repair & Replace
Heating and Cooling Package Units
Rooftop Heating and Cooling System Installation
Install & Relocate Air Conditioner
HVAC Replacements

No Cool Air? No Hot Air? Call Us at (909) 982-5698

High-Efficiency Heating & Cooling Systems
Filters • Indoor Air Quality Systems
Refrigerant Leaks
Indoor Air Quality Control
Airflow Ducts •  Ductwork Improvement
Central Air-Conditioning Units
HVAC System Tune-ups
Fan Motors
Troubleshooting and Diagnosis


Install a New Heater or Repair an Existing Unit

Heating Repair & Troubleshooting
Central Heating Repair & Installation
Filter Replacement
Gas Furnace Repair & Installation
Fan Motors
Troubleshooting and Diagnosis
Airflow Ducts
Condenser Repair & Replacement
Heat Pump Repair & Replacement
Indoor Air Quality Control & Air Filtration Systems
Gas Leak Detection & Repairs


Solutions To All Your Plumbing, Heating And Air-Conditioning Needs Since 1973

Klaus & Sons is a full-service HVAC company. We can help you solve any air-conditioning, heating or ventilation problem. Our technicians have extensive experience, and our customer loyalty and satisfaction reflect the quality of our work and commitment to solving all your HVAC repair and installation issues.

Licensed California Contractor

Same Day or Next Day Service

Repair All Makes and Models

Emergency Service Available

Upland Owned & Operated for Over 40 Years

No Hidden Charges or Fees


Customer Reviews

Klaus & Sons is proud to share numerous reviews from satisfied customers. Check out the quotes below or go to our Review Us page and listen to what our customers have to say about our service. We welcome feedback and hope you will review our services.

  • Our technician, Tyler, was friendly and knowledgeable. Service was clean, fast and the office was helpful and kind.

    Bruce H. Rancho Cucamonga
  • Our technician was thorough and courteous and answered all of our questions. We are repeat customers.

    Joanne H. Pomona
  • I cannot believe how honest you guys are! Marino installed a new water heater, he was so helpful. He, Wes and Gene are awesome!

    Kristin F. Glendora
  • Fred was professional and courteous. Thank you for traveling to Mt. Baldy, it is appreciated. The service was very good, fast and the office staff was helpful and kind.

    Elna H. Mt. Baldy
  • Klaus & Sons continues to take excellent care of all our plumbing needs, as they have for decades.

    Betty P. Alta Loma
  • Andrew was polite,  knowledgeable and we received excellent customer service.

    Donna D. Upland
  • Very good service! We were well pleased. Tifanny was very helpful.

    Fred G. Upland
  • Our technician, Wes, was a happy hard-working, thinking tech. Clean, fast. We are repeat customers.

    Allen F. Upland
  • We referred our neighbors. Andrew was very informative and nice.

    Sherry H. Upland
  • Our technician was Fred. We were very impressed with the service, especially with Fred, who is very professional. You should be very proud of him he is a great asset to your company.

    Ann P. Upland

Your Upland Plumber

Our team of professional plumbers is ready to help you with all plumbing repair and installation services. As a local plumbing company, we can get to your home promptly and deliver our affordable plumbing services.

 The Clean
Plumbing Team

 Licensed and insured, Upland homeowners rely on Klaus & Sons’ fast and dependable service. Our plumbers work every job as cleanly as possible so you don’t have a mess. We handle all types of drain cleaning and plumbing jobs, large or small. Count on our Upland plumbing team to get the job done right the first time!

Heating Repair & Installation

Our focus is heating your home safely and as efficiently as possible. Routine maintenance and and energy efficient heating units can help lower your energy bills significantly. We are your heating and furnace specialists in Western San Bernardino County and Eastern Los Angeles County.

 Servicing All Makes & Models
of HVAC Equipment

We can service most makes and models and are a Lennox factory authorized dealer. Lennox is a leader in efficiency and reliability, with outstanding warranties. They offer great financing, so along with our free estimate you’ll know exactly your home requires with no hidden fees or surprises.

Upland Air-Conditioning
Installation & Repair

Our factory-trained technicians provide air-conditioning installations, repairs and testing for your home or business. We can examine your unit to help determine when an upgrade is necessary. During the summer months quality air-conditioning is a necessity. The wrong unit or a faulty installation can lead to aggravating maintenance problems and poor cooling air circulation.

 Efficient & Way Cool

We are a Lennox HVAC dealer, and our factory trained technicians will determine the best system for your overall comfort. We also can tackle repairs on most models of air-conditioners so you can rest comfortably knowing your AC system is being maintained and repaired properly. We are your Upland air conditioning specialists.

About Klaus & Sons

More reasons to call Klaus & Sons…


Klaus & Sons has highly-trained and product-knowledgeable technicians to make sure every service call is done right the first time. We also pride ourselves on our friendly and professional customer service staff.


We respect our customers’ time and always arrive to our residential and commercial appointments on time.


Our technicians undergo ongoing education to ensure that the latest industry practices and standards are strictly adhered to. We offer state-of-the-art techniques and products that are designed to last.


Klaus & Sons has a 24-hour-a-day answering service, making after-hours contact simple. We understand that many plumbing, heating and air-conditioning issues don’t happen during regular business hours and we are here for every emergency call. Call us at (909) 982-5698 anytime you need a plumber, heating repair, air-conditioning repair or any HAVC maintenance or installation.


We respect all working environments and will leave your home or business clean. Our professional technicians work as cleanly and efficiently as possible to make sure that you can get life back to normal quickly.


Klaus & Sons offers a 100% guarantee, which means our job is not finished until you are completely satisfied. You will have peace of mind knowing that you’ve selected a company that is committed to getting the job done right.

Air-conditioning installation and repair, heating repair and installation and all plumbing services are part of the Klaus & Sons satisfaction guarantee.

 Request a service by an expert technician…



Alta Loma • Azusa • Charter Oak • Chino • Chino Hills • Claremont • Diamond Bar • Fontana • Glendora • La Verne • Montclair • Ontario • Pomona • Rancho Cucamonga • San Dimas • Upland • Walnut