AC repair for Porter Ranch's newer, larger homes
Porter Ranch climbs into the Santa Susana foothills at the north-west corner of the Valley, and most of its homes are newer, larger planned-community houses, many of them two stories with zoned systems. That changes what goes wrong:
- Zoned systems with dampers, a zone board and several thermostats, where one bad damper motor leaves a floor hot.
- Two or three systems per house, often installed at the same time and wearing out together.
- Communicating thermostats and variable-speed equipment that need the right diagnostics rather than parts swapping.
Porter Ranch is part of the City of Los Angeles (LADWP power, LADBS permits). For whole-house replacements, see AC installation.

Heating and furnace repair in Porter Ranch
Foothill evenings get cold, and two-story homes need even heat on both floors. We repair furnaces, heat pumps and zone controls in Porter Ranch homes; see heating repair and furnace repair.
Heat pumps in Porter Ranch
Heat pumps are a common upgrade when the original systems in a Porter Ranch home reach the end of their life, replacing both cooling and gas heating. Each zone should be sized and its controls matched; see heat pump installation.
Indoor air quality in Porter Ranch
Porter Ranch sits below the Aliso Canyon gas storage field, site of the 2015 to 2016 gas leak, and next to foothill brush that burns in fire season. For cleaner indoor air we install high-grade filtration and air purification and clean and seal ducts; see indoor air quality.
Porter Ranch AC repair questions
Upstairs is hot and downstairs is fine. What should I check?
Check that the upstairs thermostat is calling for cooling and the filter is clean. If both are fine, a zone damper or the zone board is the likely cause; we test them before suggesting any new equipment.
Should I replace both systems at once?
If both are the same age and one has failed, replacing them together keeps the zones matched and makes it one project instead of two. We price both ways.
Do you offer emergency AC repair in Porter Ranch?
Yes, 24/7 emergency service is available.

What customers say
"Estimate Friday, Installation on Monday. Perfect transaction. Ernie explained everything and responded quickly to all my inquiries..."
"I am very happy with the work they did... I recommend this company if you looking to install HVAC."
"I had a heating system installed by Elvira Ocean & Air, and I couldn't be happier. The technicians were skilled and courteous."