The short answer
AllPro HVAC Services repairs gas furnaces, heat pumps, and wall heaters in South Pasadena (91030), with 24/7 emergency service available. We diagnose the actual cause first, explain your repair options, and tell you plainly when a repair makes more sense than replacement.
South Pasadena winters are mild, so many furnaces and heat pumps sit idle for months and then get asked to work hard on the first cold nights. That pattern brings out problems that went unnoticed all year: a dirty flame sensor, a weak igniter, a clogged filter, or a blower motor that struggles after months of rest. AllPro HVAC Services repairs heating systems for homes throughout South Pasadena and the 91030 ZIP code. We're based in Los Angeles, about 4 miles west, so we can reach you quickly, and we offer 24/7 emergency service when the heat goes out at night or on a weekend.
Heating Problems We See in South Pasadena Homes
Los Angeles has a Mediterranean climate with mild winters. Heating systems here run in short bursts, often only a few weeks a year, instead of steadily for months. Long idle stretches let dust settle on burners and sensors, let filters go unchanged, and let small electrical problems hide until the first cold snap. These are the calls we get most often:
- Furnace blows cold air or starts and then shuts off after a few seconds, often a dirty flame sensor or an ignition problem
- No response at all when the thermostat calls for heat, which can point to thermostat wiring, a tripped safety switch, or a failed control board
- Burning-dust smell on first startup that doesn't clear after an hour or so
- Banging, rattling, or squealing from the blower or inside the cabinet
- Heat pump stuck in defrost, running constantly, or not switching from cooling to heating
- Uneven heat between rooms, often caused by airflow restrictions or duct leaks
- Older wall and floor furnaces that won't stay lit
How a Heating Repair Visit Works
We start by asking what you've noticed: when the problem began, what the system does, and any sounds or smells. Then we test the system instead of guessing. On a gas furnace, that means checking ignition, the flame sensor, gas pressure, safety limits, venting, and blower operation. On a heat pump, we check refrigerant-side performance, the reversing valve, defrost controls, and electrical components.
Once we find the cause, we explain it in plain terms and give you your options before any work begins. Many common repairs, like replacing an igniter, cleaning a flame sensor, or swapping a failed capacitor, can often be done on the first visit. If a part has to be ordered, we tell you so up front and make the system as safe and usable as we can in the meantime.
Safety Comes First With Gas Heat
If you smell gas, leave the house and call the gas utility's emergency line or 911 from outside before you call us. Don't flip switches or try to relight anything. Carbon monoxide is the other serious risk. A cracked heat exchanger, a blocked flue, or poor venting can let it into living spaces. Make sure your carbon monoxide alarms work, and call us right away if one goes off or if the furnace flame looks yellow and lazy instead of blue. During every furnace repair, we check venting and combustion safety along with the part that failed.
Repair or Replace? What South Pasadena Homeowners Should Know
Most heating problems are worth repairing. Replacement starts to make sense when the heat exchanger is cracked, when repairs keep coming back, or when an aging system can't heat the home evenly anymore. If you reach that point, a few local rules and programs are worth knowing about.
South Coast AQMD Rule 1111 limits NOx emissions from natural-gas fan-type central furnaces sold and installed in this region, and the district has been amending it toward zero-emission requirements. Because the district sets and revises the compliance dates, check the current rule before planning a furnace replacement. We can help you work through what applies.
Many homeowners look at heat pumps as an alternative. Rebates depend on which utility serves your address. LADWP customers can apply for rebates on qualifying heat pump systems, but many homes outside the City of Los Angeles are served by Southern California Edison instead, so we confirm the current offer for your address before quoting it. Keep in mind that the federal 25C tax credit for heat pumps applied only to systems placed in service before December 31, 2025, so it isn't available for new installations.
Serving South Pasadena and Nearby Communities
We provide heating repair across South Pasadena and nearby Alhambra, San Marino, San Gabriel, Pasadena, and Monterey Park. Whether you need a no-heat fix on a cold evening or a technician to track down a recurring problem, we're close by and available around the clock for emergencies.
More services in South Pasadena
- AC Repair in South Pasadena
- Heat Pump Installation in South Pasadena
- AC Installation in South Pasadena
- Furnace Repair in South Pasadena