Heating Repair & Installation in Tarzana, CA
Cold morning and no heat? Cooling By Design repairs furnaces and heat pumps and installs efficient replacements for Tarzana homes, apartments and businesses. Same-day heating service available, with 24-hour emergency help.
- Licensed & Insured
- Same-Day Service
- 24-Hour Emergency Service
- Financing Available
Who Repairs and Installs Heating Systems in Tarzana?
Cooling By Design, a licensed HVAC contractor (CSLB #1148982) based in neighboring Canoga Park, repairs and installs furnaces and heat pumps throughout Tarzana, CA 91356. We diagnose heating failures on the first visit, quote the work in writing before we begin, and offer same-day service when the schedule allows. If your furnace is near the end of its life, we will compare repair against replacement with a gas furnace or an all-electric heat pump, and back every new system with our 10-Year Cooling Comfort Plan. See all Tarzana HVAC services.
Heating Repair in Tarzana: Problems We Fix
No heat at all
A bad igniter, dirty flame sensor, failed control board or tripped safety switch is the usual culprit when a furnace will not start.
Blowing cold air
The burners may be shutting off early, the thermostat fan may be set to on, or a heat pump may be stuck in defrost mode.
Short cycling
Overheating from a clogged filter or blocked vent, or a failing sensor, makes the furnace start and stop without warming the house.
Banging, squealing or rattling
Noisy blowers, delayed ignition and loose panels are early warnings. Fix them before they become a no-heat night.
Uneven or weak heat
Cold rooms often trace back to leaking or poorly insulated ducts in the attic, not the furnace itself.
Thermostat and control faults
Dead batteries, wiring faults and mismatched settings can mimic a failed furnace. We test the whole control chain.
How a Heating Repair Visit Works

Call or book online
Reach us at (877) 702-6654 or schedule online. Same-day heating visits are available when the schedule allows.
Safety check and diagnosis
Your technician checks gas, venting and electrical safety first, then tests the system and explains what failed in plain language.
Approve a written quote
You see the price before any work starts. No pressure to add anything you do not need.
Repair, test, explain
We fix it, confirm steady, even heat and show you how to keep the problem from returning.
Furnace or Heat Pump? Choosing a New Heating System in Tarzana
San Fernando Valley winters are mild, so a new heating system is judged less on raw power and more on efficiency, safety and how well it pairs with your cooling. Here is how the two main options compare for a typical Tarzana home.
| Factor | Gas furnace plus AC | Heat pump |
|---|---|---|
| How it works | Burns natural gas for heat; a separate AC cools | Moves heat electrically and both heats and cools |
| Mild Valley winters | Fast, powerful heat on cold mornings | Very efficient in mild climates and delivers steady warmth |
| Operating cost | Depends on gas and electric rates | Often lower for heating, depending on your electric rate plan |
| Equipment to maintain | Two systems | One system |
| Best fit | Homes with existing gas lines and ductwork that want quick heat | Homes replacing furnace and AC together, or moving toward all-electric |
Sized and permitted correctly
We size by load calculation, check ductwork and handle permits and California energy-code requirements for the installation.
Safe venting and combustion
Gas furnace installs include proper venting, gas connections and combustion testing so your home stays safe.
Smarter control
Pair your system with a modern thermostat from our products range for easier scheduling and lower bills.
Install Your Heating System Once. Relax for 10 Years.
Every new system from Cooling By Design includes our 10-Year Cooling Comfort Plan: a 10-year parts warranty, 10-year labor coverage, professional maintenance before every summer and winter (20 seasonal tune-ups) and flexible payments.
What Tarzana Homeowners Should Know About Heating
A short drive from Canoga Park
Tarzana is a few miles from our Canoga Park office, so a heating call usually means a quick trip by Ventura Boulevard or the 101. When the furnace quits on a cold morning, that matters.
Cool nights and canyon air
Inland Tarzana has bigger day-to-night swings than coastal areas, with winter lows around 45°F, and canyon winds and dust load up filters and blowers. We clean and test the whole system, not just the furnace.
Established homes, uneven heat
Many Tarzana homes have older ducts and additions, so some rooms run cold while others overheat. We check airflow, returns and balance as well as the equipment itself.
Condos, townhomes and offices
Along the Ventura Boulevard corridor you will find condos, townhomes and small offices. We repair and replace furnaces and heat pumps for multi-unit and commercial properties too.
Gas safety in older systems
Older furnaces and venting deserve a careful look. We inspect the heat exchanger, gas connections and flue and recommend carbon monoxide detectors at every visit.
Heat pumps and electric upgrades
Because winters are mild, a modern heat pump can heat and cool a Tarzana home efficiently and reduce reliance on gas. We help you compare options and sizing before you decide.
Trusted for Honest HVAC Service
Posted on Google Victor Hugo Rivas GarciaTrustindex verifies that the original source of the review is Google. "I recently had Cooling by Design come out to perform routine maintenance on my AC unit, and I couldn't be happier with the service. The technician was punctual, extremely knowledgeable, and took the time to explain everything they were checking. They were respectful of my home, left the workspace spotless, and gave me total peace of mind heading into the hotter months. It's hard to find HVAC companies that are this honest and professional. Highly recommend Cooling by Design to anyone needing reliable maintenance!"Posted on Google Maty NaimTrustindex verifies that the original source of the review is Google. Great service! They came quickly and on time, gave me a very fair price, and got the AC fixed fast. Professional, clean, and reliable. Highly recommend!Posted on Google Ashley GlacelTrustindex verifies that the original source of the review is Google. Cooling By Design came quickly - in a heat wave! Found the problem, got the unit working again swiftly. Would call again!Posted on Google Eliot SolomonTrustindex verifies that the original source of the review is Google. Adi came to take a look at my HVAC system. It had a smell and was not blowing cool air like it was supposed to. I haven't used it for a little while so I was expecting to get ripped off. I took a chance and Adi was on time and was courteous. I was not hovering over him because it was hot outside. But about 10 minutes later it was blowing cold air and the smell was almost gone. His Price was way under what I was expecting to pay and will use him again if I need to.Posted on Google Johnny AliasTrustindex verifies that the original source of the review is Google. Cooling by Design installed a high efficiency communicating HVAC system with all new ducts in our Encino home. Adi spent a lot of time designing the system so the temperature is balanced throughout the house. It’s easily the best comfort we’ve ever had.Posted on Google Sayde MartinezTrustindex verifies that the original source of the review is Google. Our A/C stopped working during this week's heatwave. When the tech came out the next morning, he quickly diagnosed the issue and got us back up and running. Thank you, Adi, for helping us out in Newbury Park and for the honest work!Posted on Google Abtin BidgoliTrustindex verifies that the original source of the review is Google. Our AC went out during a brutal hot weekend in Woodland Hills - basically worst-case timing. Cooling by Design showed up within hours, diagnosed the issue fast, and got everything running again without any runaround. What stood out most: clear communication, fair pricing, and no upsell pressure. Just solid, honest work when we needed it most. Definitely keeping Adi & Cooling by Design as our go-to.Posted on Google Adam WolmanTrustindex verifies that the original source of the review is Google. I’ve worked with the owner on multiple major projects over the last few years, including post-fire cleanup, and remain on an annual maintenance plan, because Adi’s been highly dependable and his techs knowledgeable. Good on eco-friendly options, including heat pumps (two — both work great and have cut back on electricity use) and whole-house clean air solutions.Posted on Google Yaron yasharTrustindex verifies that the original source of the review is Google. I have used Adi the owner for the last 12 years for all my HVAC projects. From my new construction to all smaller projects and recommended him to all my clients. Always responsive, and always take responsibility whenever I need him. Can say enough good things about him and his work ethic. Highly recommended!Verified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more
Posted on Yelp![]()
Alex R.Verified
Adi came by and fixed my AC within 20 minutes of calling. Great service and quick responsePosted on Yelp![]()
Tammy D.Verified
I had Cooling By Design come to fix my A/C during one of the hottest and busiest times of the year. They were able to get me on the schedule the same day and repair completed as well. Adi was consistent in communicating throughout the day. He was trustworthy to come into my residence when I left it open due to work related issues. I would highly recommend them. The repair was done with something basic that was needed and they did not try to add on extra work to make more on the job. Very grateful customer.Posted on Yelp![]()
AshleyVerified
Cooling By Design came quickly - in a heat wave! Found the problem, got the unit working again swiftly. Would call again!Posted on Yelp![]()
Sayde C.Verified
Our A/C stopped working during this week's heatwave. When the tech came out the next morning, he quickly diagnosed the issue and got us back up and running. Thank you, Adi, for helping us out in Newbury Park and for the honest work!Posted on Yelp![]()
Abtin B.Verified
Our AC went out during a brutal hot weekend in Woodland Hills - basically worst-case timing. Cooling by Design showed up within hours, diagnosed the issue fast, and got everything running again without any runaround. What stood out most: clear communication, fair pricing, and no upsell pressure. Just solid, honest work when we needed it most. Definitely keeping Adi & Cooling by Design as our go-to.Posted on Yelp![]()
Adam W.Verified
Good with eco-friendly options, including heat pumps (work great and have saved us $$ on electricity use) and whole-house clean air filters. Have worked with the owner on several projects, including post-fire cleanup, and am on an annual maintenance plan. Adi has been highly dependable and his techs very sharp & friendly.Verified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more
Heating Repair and Installation FAQs for Tarzana
Why is my furnace blowing cold air?
Common causes are a dirty flame sensor or failing igniter that shuts the burners off, a thermostat fan set to on instead of auto, a clogged filter causing overheating, or a heat pump in defrost mode. If it does not warm up after a few minutes, call a technician.
How often should I service my furnace in Tarzana?
Once a year, ideally in early fall before the first cold nights. Our maintenance plans schedule professional tune-ups before every summer and winter, so heating and cooling are both checked on time.
Is a heat pump better than a furnace for the San Fernando Valley?
For many homes, yes. Heat pumps are most efficient in mild climates like the Valley, and one unit both heats and cools. A gas furnace remains a good choice for homes with existing gas service and ductwork that want fast, strong heat. We will compare both for your home.
How long does a furnace or heat pump last?
A well-maintained gas furnace commonly lasts 15 to 20 years, and heat pumps typically last 12 to 15 years. Age matters less than repair history, safety condition and efficiency, so we assess all three before recommending replacement.
What should I do if I smell gas?
Leave the home immediately, do not touch light switches or use flames, and call your gas utility’s emergency line and 911 from outside. After the utility declares the home safe, call Cooling By Design to inspect the furnace.
Does a new heating installation require a permit?
In the City of Los Angeles, replacing a furnace or heat pump generally requires a permit and compliance with California’s energy code, which often includes duct testing. We handle the permit and inspection for you.
Can I finance a new heating system?
Yes. Financing is available, and installing with us includes the 10-Year Cooling Comfort Plan with a 10-year parts warranty, 10-year labor coverage and professional maintenance. See our financing options.
Get Warm Again in Tarzana
Request a quote or call (877) 702-6654 for same-day heating service. Need cooling instead? See our AC repair and installation in Tarzana.
Get Your Free HVAC Quote
Tell us what you need and a Cooling By Design team member will reach out shortly. Need help right now? Call (877) 702-6654.