Frequently Asked Questions

Keen Tech Mechanical HVAC is a locally owned HVAC contractor based in Bellflower, CA. We have been serving homeowners and businesses across Southeast Los Angeles County for over 10 years. We are EPA certified, fully licensed, and insured.

We serve Bellflower, Lakewood, Downey, Norwalk, Cerritos, Long Beach, Paramount, Carson, and all surrounding communities in the 562 area code. If you are in Southeast LA County, there is a good chance we cover your neighborhood—call us to confirm.

Yes. We hold an EPA 608 certification (LIC #6979615) and are fully licensed and insured to perform HVAC work in California. All of our technicians are background-checked before working in your home or business.

Yes. We service both residential homes and commercial properties, including offices, restaurants, warehouses, retail spaces, and any business that needs HVAC or refrigeration service.

Keen Tech Mechanical HVAC has been serving the Southeast Los Angeles community for over 10 years. We are not a franchise or a national chain—we are a local team that has built its reputation one job at a time.

We offer AC repair and installation, heating and furnace service, ductless mini split installation, indoor air quality systems, commercial HVAC, commercial refrigeration repair, and seasonal maintenance plans. We handle both repairs and full system replacements.

We service and install all major brands with no restrictions: Trane, Carrier, Lennox, Rheem, Daikin, Mitsubishi Electric, American Standard, Goodman, York, and more. We do not require you to switch brands to work with us.

Yes. Ductless mini splits are one of our most requested installations—particularly for older homes without existing ductwork, room additions, garages, and multi-family units. We install all leading brands and can typically complete a single-zone installation in one day.

Yes. We service walk-in coolers, reach-in refrigerators, freezer cases, prep table units, and commercial ice machines. We work with restaurants, markets, and any food-service business that needs fast, reliable refrigeration service.

Yes. We install whole-home HEPA filtration systems, UV germicidal air purifiers, electronic air cleaners, and fresh-air ventilation upgrades. These systems are especially valuable for families with allergy or respiratory concerns or homes near high-traffic roads.

Yes. We install, service, and repair heat pumps—including modern variable-speed systems. Heat pumps are an increasingly popular choice in Southern California because they handle both heating and cooling efficiently in our mild climate.

Still have a question? Call (562) 228-9286 or visit ktmhvac.com- we are happy to help.

Our diagnostic evaluation is a $69 flat rate. This covers a full assessment of your system, identification of the root problem, and a written repair estimate. If you approve the repair, the $69 is applied toward your service total.

Estimates on new system installations are always free. The $69 diagnostic fee applies to service calls where we are troubleshooting an existing system—it is not a free visit, but it is a fixed, upfront cost with no hidden charges.

Before any repair work begins, we give you a written flat-rate estimate for the job. The price you approve is the price you pay—we do not add charges after the fact or bill by the hour in a way that creates surprises. You are always in control.

We accept Visa, MasterCard, American Express, Discover, cash, and check. Financing is also available on qualifying installations—ask us about current financing options when you request your estimate.

Is financing available?

Yes. We offer financing on qualifying HVAC system installations. If the upfront cost of a new system is a concern, we can walk you through financing options with no obligation. Ask about current terms and approval requirements when you call.

Customers served by SoCal Edison and SoCalGas may qualify for rebates on qualifying high-efficiency HVAC equipment. Rebate amounts change seasonally. We will walk you through currently available programs during your free estimate appointment.

Call us at (562) 228-9286 or request an appointment online at ktmhvac.com. When you call, let us know what is going on, and we will get you scheduled as quickly as possible—often the same day for repair calls.

Yes. For most repair calls in our service area, same-day scheduling is frequently available. This is not a guarantee for every call, but it is our goal. The earlier in the day you call, the better your chances of a same-day visit.

Yes. We operate a 24-hour emergency line at (562) 228-9286. HVAC emergencies do not keep office hours, and neither do we. When you call after hours, you are connected directly to our team—not a call center or answering service.

Monday through Friday: 8:00am to 6:00pm. Saturday: 8:00am to 4:00pm. Sunday: Closed. Our 24-hour emergency line is available every day for urgent situations outside regular hours.

We dispatch from Bellflower, which puts us close to most of our service area. Response times for emergencies vary depending on demand, time of day, and location, but our goal is always to get to you as quickly as possible—particularly during peak summer months.

Still have a question? Call (562) 228-9286 or visit ktmhvac.com- we are happy to help.

General rule: if your system is under 10 years old and the repair cost is less than 50% of the replacement cost, repair usually makes sense. If the system is 15+ years old, experiencing repeated failures, or losing efficiency noticeably, replacement is likely the smarter long-term investment. We give you an honest assessment—not a sales pitch.

We recommend a professional tune-up at least once per year. In Southern California, where AC runs hard from late spring through early fall, spring is the ideal time to service your cooling system before peak demand. Heating systems should be checked in fall before the first cold nights.

A standard tune-up includes a full system inspection, coil cleaning, filter check and replacement, refrigerant level check, thermostat calibration, electrical connection tightening, lubrication of moving parts, and a written report on overall system health.

The most common causes are low refrigerant (typically from a leak), a dirty condenser coil, a failed compressor, or a refrigerant metering issue. Some can be simple fixes; others require more significant work. Our $69 diagnostic will identify the exact cause before any repair begins.

First check your thermostat settings and battery. Check that the circuit breaker for the furnace has not tripped. Make sure the filter is not completely blocked—a clogged filter can trigger a safety shutoff. If none of those resolve it, call us. Do not attempt to reset gas components yourself.

Yes. Our annual maintenance plans include a full seasonal inspection, coil cleaning, filter replacement, thermostat check, and priority scheduling. Maintenance plan customers get priority booking—they never wait behind new callers when something goes wrong.

A standard central AC replacement typically takes four to eight hours, depending on system complexity and whether any duct modifications are needed. Ductless mini split installations for a single zone can often be completed in a single day. We give you a realistic time estimate when you book.

AC sizing is based on your home's square footage, ceiling height, insulation, window area, and local climate. An undersized system will run constantly and never cool properly; an oversized one will short-cycle and create humidity problems. We calculate the right size for your specific home—no guessing.

SEER (Seasonal Energy Efficiency Ratio) measures how efficiently an AC system uses electricity. Higher SEER = lower operating costs. The current California minimum is 15 SEER for new installations. We recommend 16 SEER or higher for most customers, which can also qualify for SoCal Edison rebates.

Yes. Ductless mini split systems are designed for exactly this situation. They require no ductwork, can be installed in most homes without major construction, and allow room-by-room temperature control. They are also highly efficient—often more so than traditional ducted systems.

A properly installed and regularly maintained central AC system typically lasts 15 to 20 years. Furnaces can last 20 to 25 years. Ductless mini splits generally last 15 to 20 years as well. Annual maintenance significantly extends equipment life and keeps warranties valid on newer systems.

Still have a question? Call (562) 228-9286 or visit ktmhvac.com—we are happy to help.

We service and install rooftop packaged units, commercial split systems, commercial air handlers, VAV systems, and commercial ventilation. We also offer preventive maintenance contracts for businesses that want scheduled, predictable service on a fixed-fee basis.

Yes. Restaurants are one of our most common commercial clients. We handle commercial kitchen HVAC, walk-in cooler and freezer repair, reach-in refrigerator and prep table service, and make-up air systems. We understand that downtime in a restaurant kitchen costs real money—we prioritize fast response.

Yes. We offer commercial maintenance contracts for businesses of all sizes. A contract gives you scheduled inspections, priority emergency response, documented service history, and predictable annual costs. Contact us to discuss what a plan would look like for your facility.

We service a wide range of commercial and light industrial facilities in Southeast LA County, including warehouses, manufacturing spaces, and multi-tenant office buildings. Call us to discuss your specific facility, and we will let you know if your needs are within our scope.

Our primary service area includes Bellflower, Lakewood, Downey, Norwalk, Cerritos, Long Beach, Paramount, Carson, Compton, South Gate, Lynwood, Hawaiian Gardens, Artesia, La Mirada, and all surrounding communities in Southeast Los Angeles County. Call us if you are unsure whether we cover your area.

If you are in the 562 area code or Southeast Los Angeles County, there is a strong chance we serve your neighborhood. The best way to confirm is to call us at (562) 228-9286—we can tell you immediately whether your address is in our service area.

No. Our pricing is consistent across our full service area. We do not add travel surcharges for neighboring cities. The $69 diagnostic fee and flat-rate pricing apply equally whether you are in Bellflower, Long Beach, Carson, or Cerritos.

We are based in Bellflower, CA—a central location in Southeast Los Angeles County that puts us within minutes of most of our service area. Our proximity is one of the reasons we can offer same-day service and fast emergency response to so many communities.