HVAC Repair Los Angeles: $300 to $900 + HERS Tests (2026)

LA's repair range starts higher than HomeAdvisor's national range. Confirm LADWP's current rebate before you buy; the amount shown was published in March 2024.

Do this now: AC or furnace out in Los Angeles

Deal with gas and heat first: a gas smell or CO alarm means get everyone outside and call 911 (CPSC), and above 90 F indoors the CDC says a fan can raise body temperature.

1. Smell gas at the furnace or a CO alarm sounds? Get everyone outside and call 911.
2. Heat stroke signs? A body temperature above 103 F, hot red dry skin, a fast strong pulse or confusion: call 911 first (Ready.gov).
3. Over 90 F inside? The CDC says a fan can raise body temperature at that point, so go somewhere with air conditioning. Dial 2-1-1 to find one.
4. Power out? LADWP customers report outages at 1-800-342-5397. After power returns, check the breaker before you book a visit.
5. Check the thermostat, the filter and the breaker before calling.

Is it an emergency? Signs to call an LA HVAC company today

No AC is an emergency in Los Angeles when a late-summer heat wave pushes the house past 90 F and someone at higher risk is home; the CDC names people 65 and older, infants and young children, and people with asthma or heart disease.

• Heat stroke signs. Call 911 first.
• September heat. Downtown's normal highs peak at 84 F in August and 83 F in September, so breakdowns cluster late in the season.
• No heat on a cold night. The USC station logs 1,005 heating degree days a year, close to its 1,296 cooling degree days.
• Gas smell or a CO alarm. Get out first, then call.
• An AC that will not restart after an outage. In the January 2025 windstorm about 92,000 LADWP customers lost power at one point; reset the breaker once, and call if it trips again.

Can it wait? An AC that runs but falls behind on a mild day can usually wait for regular hours. HomeAdvisor puts after-hours AC labor at $160 to $250 an hour nationally, against $75 to $150 in regular hours.

LA HVAC permits: express permits and HERS testing

Most like-for-like swaps in the City of Los Angeles qualify for an LADBS Express Permit with no plan check. LADBS lists "Replacing A/C units with same size & type," adding AC equipment rated 5 tons or less, gas furnaces under 500,000 Btu/h, and ductwork changes among the express items. A bigger or different system may need more review.

California adds an energy check on top. The California Energy Commission says "properly permitted work will trigger any necessary HERS testing," gives changing the HVAC system as an example, and says HERS paperwork is required to close the permit. As of January 1, 2026 those field verification rules sit in Title 24, Part 6. An unpermitted swap skips that test, which is one reason to insist on the permit.

Homeowners can pull an owner-builder permit only if they do the work themselves, have lived in the home at least 12 months, and hold owner-builder permits on no more than two structures in three years, LADBS says.

Local rules, contacts and climate for Los Angeles, from official city, state, utility and NOAA pages unless the source says otherwise.

Los Angeles heat comes late in the summer

Downtown Los Angeles is milder than most of the cities we cover, and its hottest months are late. NOAA's 1991 to 2020 normals for the USC campus station show a July high of 82 F, rising to 84 F in August and 83 F in September, with 1.8 days a year at 100 F or above. The station logs 1,296 cooling degree days and 1,005 heating degree days, so many homes need both heat and cooling.

Fire weather is the other stress. In the January 2025 windstorm and fires, about 92,000 LADWP customers and 314,000 Southern California Edison customers lost power at one point, and SCE's safety shutoffs hit 166,737 customers, Renewable Energy World reported. After an outage, check the breaker before you book a visit; the HVAC repair guide lists what to check first.

Rebates in LA: what is left in 2026

LADWP advertised rebates of up to $300 per ton for qualified central heat pumps in its March 2024 customer newsletter; confirm the current figure before you buy. The two big state programs are closed to new single-family jobs: TECH Clean California says its heat pump HVAC incentives were fully reserved as of November 14, 2025, and the CEC says HEEHRA single-family rebates were fully reserved statewide as of February 24, 2026. No federal 25C credit applies to 2026 installs, the IRS says. Heat pump installation cost has national prices; ConsumerAffairs puts a full LA system at $7,400 to $15,000.

What to ask an LA HVAC contractor

1. What is your CSLB license number, and is it a C-20?
2. Will this go under an LADBS Express Permit, and who books the HERS test?
3. Is the technician EPA Section 608 certified?
4. What is the diagnostic fee? ConsumerAffairs lists $90 to $165 in LA.
5. Can I see proof of insurance and the price in writing?

CSLB takes complaints against licensed and unlicensed contractors for up to four years from the act. Calls to the heating and AC line go to an independent company that serves your area and takes this kind of job; how calls work explains the referral.

More Los Angeles repair guides

Panels and circuits for a new heat pump: electrical repair in Los Angeles. Leaks and drains: plumber in Los Angeles. Solar: Los Angeles solar service. Nearby: AC repair in San Diego and AC repair in Las Vegas. Repair basics: AC repair cost; all trades: home repair costs.

Emergency AC repair in Los Angeles: after-hours rates and heat days

Emergency AC repair in Los Angeles costs more at night: HomeAdvisor's 2026 data puts after-hours AC labor at $160 to $250 an hour, against $75 to $150 in regular hours, and ConsumerAffairs lists a $90 to $165 diagnostic fee in LA before any repair. Downtown averages 25.6 days a year at 90 F or hotter and 1.8 days at 100 F or hotter, NOAA's 1991 to 2020 normals show.

Call the same night when the house is past 90 F and someone at higher risk is home, when water is leaking from the indoor unit, or when the AC breaker trips again after one reset. Above 90 F indoors, the CDC says a fan can raise body temperature, so dial 2-1-1 to find air conditioning while you wait. If the system only falls behind on a mild evening, a weekday visit costs less. LA repair prices by part are on AC repair in Los Angeles, and national after-hours rates on emergency HVAC repair.

Heating and cooling pages for Los Angeles

• AC repair in Los Angeles: capacitor, refrigerant and compressor prices, heat days, outages
• AC and heat pump installation in Los Angeles: system prices, LADWP rebates per ton, permits and HERS
• Furnace repair in Los Angeles: gas furnace repair, SoCalGas programs and permits