Heating & Air Conditioning

HVAC Repair And Installation Experts

(909) 982-5698

Heating & Air-Conditioning Repair and Installation

Local climate change has altered California’s dependence on air-conditioning systems. Klaus & Sons provides high-efficiency HVAC system repair or replacement. We help you keep your heating and air-conditioning units running at peak performance and help you lower your utility bills.

Our licensed (CSLB 320990) technicians provide expert HVAC freon charging, circuit board replacement, blower motor repair, thermostat installation and many other services to keep your system running perfectly.

Klaus & Sons installs quality Lennox heating and cooling systems. Lennox offers the best in energy-saving technology that significantly helps reduce heating and cooling bills. Our factory trained technicians have confidence in the durability and performance of our systems.

To learn more about Lennox products follow our link here. To get more information about financing options, you can explore their simple financing website at Lennox Buyers Guide.

Air Conditioning Services

Local businesses and homeowners understand that central air-conditioning systems are extremely important in an area known for its long, hot summers. Our highly trained HVAC technicians can meet all your basic air-conditioning service needs quickly and get you cool down fast!

Air Conditioning Repair

We can service any AC system in your home or business and get you up and running again quickly! 24 hour emergency service is available. Inland Empire homeowners know they can trust Klaus & Sons for fast, reliable air conditioning repair. We service most of the major air-conditioning system brands including Honeywell, Bryant, Rheem, Tran, Day & Night, Lennox, York and others.

AC Installation & Replacement

Klaus & Sons can install a high-efficiency air-conditioning system in your home or business that can help lower your utility bills while providing maximum comfort.

Basic AC Maintenance

Maintaining your AC system is important. You can call on our service team to help you maintain your air-conditioners components and help them run smoothly throughout the year.

Heating Services

Klaus & Sons won’t let your heating system let you down.

Heating System Installation

Our trained technicians can analyze any space and make sure that you have a system that meets your needs and is energy-efficient. We can replace furnaces and heat pumps and find solutions for any local heating system problem.

Heater Maintenance

Why wait until you have a problem to call Klaus & Sons. We perform routine heater maintenance that can help you avoid costly problems and increase your system’s efficiency. Lower utility bills are important to our customers. Let us find ways to give you maximum comfort with the most efficient heating system. We inspect ductwork for leaks, dirt and insulation problems and make sure that thermostats are calibrated properly. Cleaning air filters, inspecting burners, cleaning the return air grill and checking the condition of electrical wiring are just a few of the maintenance tasks that we perform to keep your system working at its best.

Heater Repair

Klaus & Sons can troubleshoot and repair any system. Count on our 24 hour emergency service to help you immediately solve heater breakdowns. We promise not to leave you out in the cold!


(909) 982-5698

Professional HVAC Tune-Ups Keep Your System Running Efficiently

Professional HVAC Tune-ups

Klaus and Sons provides complete precision tune up and professional cleaning as described below for your local heating and/or air conditioning equipment – system needs:



  • Meets manufacturers warranty requirements
  • Extended equipment life
  • Fewer Repairs
  • Priority Customer Status
  • Lower Utility Bills
Precision Tune-Up Includes:

Precision Tune-Up Includes:

  • Clean and adjust burner assembly
  • Clean ignition assembly
  • Clean heat exchanger or elements
  • Monitor flue draft
  • Monitor refrigerant pressure
  • Test starting capabilities
  • Clean or replace air filters
  • Clean and adjust blower components
  • Measure for correct air flow
  • Measure volts and amperage
  • Lubricate all moving parts
  • Tighten electrical connections
  • Clean condenser coil
  • Clean condensate drain
  • Measure temperature difference

Air-Conditioning Services •  AC Installation & Replacement •  Air Conditioning Repairs •  AC Maintenance • Heating Services • Heating System Installation.Heater Tune-ups

Call Klaus & Sons

We have a large service menu. Don't see what you're looking for? Just call us!

Heating Repair • Air Conditioning Repair • Install High Efficiency HVAC Systems • Repair Gas Furnace • Install Digital Thermostat • R-22 Freon Leaking • R-410 Freon Charging • Install Heating – Cooling System • Duct Work Improvement • Energy Upgrades • Lower Edison Utility Bills • Indoor Air Quality •  Wi-Fi  Thermostat Install • HVAC Comfort Systems • Free HVAC Estimates • Service and Repair Gas Water Heaters • Relight Water Heater Pilot Light • Repipe House Water Lines • Hot Water Recirculating Lines • Water Supply Systems • Earthquake Gas Valves • Pressure Regulator Valve • Underground Pipe Repair • Lower Water Bills • Improved Water Quality • Replace Water Main • Water Comfort System

Frequently Asked Heating & Air-Conditioning Questions

At Klaus & Sons we know that helping you understand common HVAC issues and terms will give you peace of mind as a consumer and help you communicate with your technician so that he/she can answer any questions you have.



Alta Loma AzusaCharter OakChinoChino Hills ClaremontDiamond BarFontanaGlendoraLa VerneMontclairOntarioPomonaRancho CucamongaSan DimasUplandWalnut

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