Heating and cooling in East San Jose come down to two facts: summers here are hot, and many homes were built before anyone expected central air. So the work we see is an air conditioner that cannot keep up on the hottest afternoons, an aging gas furnace in a ranch house, or a family adding cooling for the first time. We repair, install and maintain furnaces, air conditioners, heat pumps and ductless mini-splits across East San Jose, Alum Rock and East Foothills, from our office in the 95127 ZIP.
Valley floor and foothills
East San Jose spreads across the eastern edge of the valley floor and climbs into the foothills. Alum Rock and East Foothills are the hillside neighborhoods at its eastern edge, and the two parts of the area ask different things of a heating and cooling system.
| Valley floor | Alum Rock and East Foothills hillsides | |
|---|---|---|
| Typical home | Single-story ranch and tract homes from the post-war decades | Homes on sloped lots |
| Ducts | Often in a hot attic | Longer runs to the far rooms |
| Comfort complaint | The whole house warms up on heat-wave afternoons | One or two rooms bake in the afternoon sun |
| Equipment notes | Aging furnaces; some homes never had central air | Outdoor units on slopes or in narrow side yards |
| Common upgrades | Adding AC or a heat pump, sealing attic ducts | Duct balancing, ductless units for problem rooms |
Townhomes, condos, converted garages and backyard units are common places for ductless systems, since they often have no ducts and limited space. In older homes, the electrical panel is worth checking before a heat pump goes in.
What the climate does to equipment
This is an inland climate, with dry summers, a heat wave most years and little of the cooling fog that reaches places near the ocean. An AC or heat pump that is undersized, low on refrigerant or has a dirty outdoor coil shows it on the hottest afternoons, when the outdoor unit works hardest. Ducts in a hot attic lose cooling before it reaches the rooms, so a leak that goes unnoticed in May becomes a comfort problem in a heat wave.
Winter nights are cool, often chilly in the foothills, so heating runs from late fall into spring. The first cold night after a long, idle summer is when a dirty flame sensor or a worn igniter stops a furnace. Dry summers also mean dust and, in some years, smoke days, so filters are worth checking more often during dusty and smoky stretches.
What usually goes wrong
- Summer: a failed capacitor or contactor in the outdoor unit, a clogged outdoor coil, a refrigerant leak, a blocked condensate drain. See AC running but not cooling and AC keeps tripping the breaker.
- Winter: ignition and flame-sensor faults, dirty filters, worn blower parts. See furnace running but not heating.
- All year: rooms that never match the thermostat, especially upstairs or at the end of a long run. See no heat upstairs and uneven temperatures.
Services for East San Jose homes
AC repair, AC installation, furnace repair and furnace installation are the core of the work. For ducts, see duct repair and sealing; for upkeep, our maintenance plans; for nights and weekends, emergency HVAC service. We install, repair and maintain Trane, Carrier and Mitsubishi Electric equipment and work on the other major brands too.
Our office and hours
Trane, Carrier & Mitsubishi HVAC Services, 374 Cureton Pl, San Jose, CA 95127, (650) 540-7205. The office is open Monday to Friday 7 AM to 8 PM, Saturday 8 AM to 6 PM and Sunday 9 AM to 5 PM, and emergency service runs 24/7. You get the price before any work begins, new installations get a free, no-obligation estimate, and repairs carry a 90-day warranty.