The same HVAC problem can have several causes, and guessing before calling for help often leads to extra visits and costs.
Here, we explain what common heating and cooling issues mean, when to call for HVAC repair in Woodland Hills, and what our technicians check during a diagnosis at local homes and businesses.
If the thermostat doesn’t respond or the indoor or outdoor unit is silent, the problem is usually electrical rather than mechanical.
It could be a tripped breaker, a failed capacitor, a malfunctioning contactor, or a safety switch that shuts the system down; the cause should be checked before resetting.
This applies to both AC and heating systems, since both use similar electrical parts to start. A system that won’t start isn’t always a major issue.
Some problems can be fixed during the same visit, while others need a closer look before turning the system back on.
If the system is running and the air is moving, but the house isn’t cooling, something is interrupting the cooling process. This could be low refrigerant from a leak, a dirty condenser coil, or a struggling compressor. For AC-specific diagnosis and repair, see AC repair in Woodland Hills.
If your furnace runs but doesn’t heat the house properly, or doesn’t ignite at all, there could be ignition problems, a dirty flame sensor, or airflow restrictions. This could keep heated air from reaching the rooms. See furnace repair in Woodland Hills for details on this diagnosis.
In both cases, the system is running, so the simple failures are ruled out. However, something after the system turns on isn’t working as it should.
If a room is always warmer or cooler than the rest of the house, or if airflow feels weak at the vents, the issue is often with the ductwork, not the equipment. It could be a clogged filter or a duct leak that lets air escape before it reaches the room.
It could also be a supply run that wasn’t sized correctly for that area. This is a common problem we see, and it’s more of a distribution issue than something a simple repair can fix.
If you hear an unfamiliar sound like clicking, buzzing, grinding, or a buzz that wasn’t there before, mention it when you call. Different sounds can point to different parts of the system.
The same is true for odors: a brief dusty smell when you first run the system for the season is normal, but a constant burning smell or any gas odor should be checked right away.
Short-cycling, which occurs when a system turns on and off repeatedly in short bursts rather than running on a normal cycle, is often caused by a thermostat problem, a refrigerant issue, or an electrical component that fails to turn on and off under load. Be sure to mention this when you call, as it helps narrow down the cause before a technician arrives.
If your thermostat doesn’t match what the system is doing, like calling for cooling that never happens or showing a temperature that doesn’t match the room, it could be a wiring or calibration issue instead of a problem with the AC or furnace. It’s wise to check this early, since replacing equipment won’t fix a thermostat that isn’t reading or communicating correctly.
If you notice your energy use is going up for no apparent reason, your system may be working harder than it should. This can be caused by restricted airflow, a refrigerant problem, or a part worn down to the point of reduced efficiency. This is even if it hasn’t failed.
A few situations are worth calling immediately rather than waiting: a gas smell, sparking or a burning smell from electrical components, a system that’s tripped a breaker repeatedly, or an active carbon monoxide alarm. These aren’t situations to troubleshoot yourself.
Most other situations are worth a diagnostic visit rather than waiting to see if they resolve on their own. Minor issues caught early are generally less expensive to address than the same issue after it’s caused secondary damage to other components.
Deciding between repair and replacement depends on different factors, not just one:
There’s no single formula that works for every system. The right choice relies on your specific equipment and the diagnosis. For more details, see HVAC repair or replacement in Los Angeles. If replacement is the better option, AC installation and heating installation explain what’s involved in that project.
A proper diagnostic visit identifies the real cause rather than just guessing and replacing parts. This includes checking the refrigerant charge and pressure as needed. It also includes testing electrical components under load rather than just inspecting them and making sure of sufficient airflow.
The diagnostic fee is $95 and is credited toward any repair you approve.
Once the cause is identified, you should receive a written quote before repair work starts. This quote should include any additional findings beyond the first symptom, explained separately, rather than bundled in as an assumed yes.
Los Angeles County homeowners and businesses trust us for top-notch HVAC services, and we’re proud to bring that same level of service to Chatsworth, Granada Hills, West Hollywood, Beverly Hills and Glendale. Whether it’s fixing your AC and heating or finding ways to save energy, our dedicated team is ready to provide expert solutions across these communities.
Regular maintenance can’t prevent every failure, but it catches many small issues, such as a weakened capacitor or a coil with buildup. This is before they cause unexpected repair calls. HVAC maintenance and Care Club plans handle this on a schedule, so you don’t have to wait for something to go wrong.
We provide 24/7 emergency phone dispatch for urgent situations, separate from regular office hours. If you’re dealing with a safety concern or a complete system failure, call and describe what’s happening so we can advise on next steps.
Affordable Heating and Air is a woman-owned company under California CSLB license #1081403, founded and run by Donna Kreisler.
We’re BBB-accredited at the company level, and the team includes NATE-certified technicians and EPA Section 608 certification for refrigerant handling.
Our company has a 4.9-star rating from over 1,700 Google reviews. Woodland Hills is in LADWP territory, which matters most if you’re considering replacing your system. See California HVAC rebates for the latest program details.
This usually means something interrupts the cooling process rather than airflow — low refrigerant from a leak, a dirty condenser coil, or a struggling compressor. A diagnostic visit identifies which one it is.
This can point to an ignition problem, a dirty flame sensor, restricted airflow, or, in some cases, a size issue that predates the current problem. Rather than guessing, a proper diagnosis distinguishes between them.
Not always, but it’s worth noting when you call, since different sounds point towards different likely causes. A clicking sound and a grinding sound don’t mean the same thing.
It depends on the system’s age, how often it needs repairs, whether the current problem is a one-time issue or keeps happening, and what future repairs might cost. There is no single rule for every system. Diagnose answers your question.
Yes, for urgent situations such as complete system failure or safety concerns like gas odors or electrical issues, we’re available 24/7 outside of regular office hours.
Yes. A miscalibrated or incorrectly wired thermostat can make it seem as if the AC or furnace has failed when the equipment is actually working properly. This is worth ruling out before assuming the larger system is at fault.
The diagnostic fee is $95 and is credited toward any repair you approve. The total repair cost depends on what’s found. For example, a minor electrical part costs much less than major work on the refrigerant or ignition system.
If your system won’t start, the air isn’t the right temperature, or something just doesn’t sound right, the quickest way to a solution is to describe exactly what you’re experiencing.
Call (818) 722-1332 or book a repair visit online.
Affordable Heating and Air
9601 Cozycroft Ave, Unit 1
Chatsworth, CA 91311
CSLB C-20 #1081403
Related: AC repair in Woodland Hills · Furnace repair in Woodland Hills · Indoor air quality in Woodland Hills · Heat pump services · HVAC maintenance · HVAC repair or replacement in Los Angeles
Affordable Heating and Air has completed 10 jobs in Los Angeles, CA in October 2026.
The 10 customer reviews shown here average 5.0 out of 5.
The most recent job was on October 14, 2026.
Affordable Heating and Air has completed 3,920 jobs in Los Angeles, CA in the last 12 months. The first job there was in November 2024.
Mauricio was incredibly helpful and did a great job. He knows his stuff and a great personality!
Upon inspection, I identified a refrigerant leak in the condenser coil of the air conditioning system. The leak was traced to a small puncture in the coil. I safely evacuated the remaining refrigerant and repaired the puncture using specialized tools and materials. After ensuring the repair was secure, I recharged the system with the appropriate amount of R-22 refrigerant. The system was then tested to confirm proper operation and no further leaks.
Completed
Payment was made via credit card, with a 3.5% fee, totaling $936 for the completed job. The task involved a temporary repair, akin to applying a Band-Aid, rather than a permanent solution. The system in question was an 8-year-old unit. Upon inspection, a refrigerant leak was identified as the primary issue. The payment structure included a 50% deposit upfront and the remaining 50% upon completion of the work. The repair addressed the leak, ensuring the system's temporary functionality was restored. However, it is important to note that this is not a long-term fix and further attention may be required in the future.
Well done
During the inspection, both HVAC systems were confirmed to be operating properly. However, several maintenance concerns were identified. For the 5-ton Daikin system, the ductwork had excessive dust and debris, and the outdoor condenser coil was dirty. The condensate drain line was shared with another system, and additional overflow protection was recommended. For the 2-ton heat pump, the condensate pump discharged into the 5-ton system’s drain line, and the emergency drain pan lacked an overflow safety switch. The air ducts and outdoor condenser coil also required cleaning. Recommendations include reconfiguring the condensate drainage, installing overflow safety switches, performing professional duct cleaning, and cleaning the condenser coils.
It was informative, quick, courteous .
I responded to a furnace issue where it attempted to start but shut down. The furnace, a Goodman GMS80703AXA, showed the inducer operating and the hot surface igniter glowing. The igniter measured 57.99 Ω, and the gas valve’s local switch was ON. Despite 27 VAC at the gas valve and steady inlet gas pressure, no gas flow was detected at the valve outlet. Consequently, the burners did not ignite, preventing the heating cycle from completing. The gas valve is likely faulty and needs repair.
Warranty completed
replace thermostat
Upon arrival, I identified a four-year-old furnace that had been red-tagged by the gas company. The issue was related to the mixing of unconditioned and conditioned spaces. The return air intake could potentially draw in unconditioned air, risking carbon monoxide contamination. Additionally, negative static pressure could pull natural gas into the conditioned space. I recommended sealing the return cavity, weatherproofing the return grill, and installing duct board inside the furnace to ensure only conditioned air is introduced.
Upon arrival, I found a 2016 3-ton Package Unit that was not turning on. After a thorough inspection, I discovered that the thermostat was difficult to operate, requiring significant pressure to change cycling modes. I tested both heating and air conditioning functions, which were operational during the service. However, temperature checks revealed high temperatures for heating and very low temperatures for cooling, indicating a lack of airflow. The return air duct, measuring 14x24, showed that the system was operating at about 50% capacity. Considering the system's age, I recommended proactive measures, including a potential replacement with a new gas-electric or all-electric option, especially given the customer's solar setup and state requirements by 2030.
I installed the Scorpion HX15 UVC-LED disinfection system in your HVAC unit. This robust system is designed for residential use, effectively killing mold, mildew, bacteria, and other harmful growths on the evaporator coil and surrounding areas. With its 30,000-hour lifespan and integrated air flow sensor, it lasts up to five times longer than traditional UV bulbs. It also reduces musty odors and prevents drain line clogs. I ensured your system and air quality are safe by blowing out the condensation line. 50% deposit required, with a 30-day labor warranty.
Fast and efficient. Excellent service.
I just moved to La. I contacted this company because of their great reviews. I made the right decision calling Affordable heating and air conditioning.The techs that they sent Edward and Pedro were courteous, knowledable and very professional.I highly recommend this company.
Edward was great. He explained everything thoroughly and seems very genuine.
My experience with Karma at Affordable Air was very good. His direct feedback made it easy to understand everything.
Excellent Service
Jeremy was both knowledgeable and personable
Jeremy was thorough, insightful and friendly.
