The short answer
BayPro Heating & Cooling serves Lexington Hills, an unincorporated Santa Clara County community about 13 miles southwest of San Jose. We repair and install heating, AC, heat pumps and mini-splits, and help with filtration for smoke season in hillside homes.
Lexington Hills is an unincorporated mountain community in Santa Clara County, roughly 13 miles southwest of our San Jose base and up the grade beyond Los Gatos. Life in the hills brings cooler nights, wetter winters and more wildfire smoke worries than the valley floor, and that shapes what homeowners need from their heating and cooling. BayPro Heating & Cooling makes regular trips up to Lexington Hills to repair furnaces and air conditioners, install heat pumps and ductless mini-splits, service equipment before the rainy season and help families keep indoor air clean when smoke drifts in. Below is what we focus on in this area and how to get the most out of a visit.
Life above the valley floor
Hill homes here usually run their heat for a bigger share of the year than houses down in the valley. Nights cool off sharply, fog and rain linger among the trees, and shaded lots may never fully warm up on a winter day. A furnace or heat pump that would be fine in a flatland tract house can feel overmatched in a drafty cabin with single-pane windows.
Summer is a different story on sunny ridgetops and south-facing slopes. Those houses can get surprisingly warm by late afternoon, which is when a weak AC or an aging heat pump shows its limits. We look at where your house sits, how much shade it gets and how it was built before we recommend repairs or new equipment.
Smoke season and indoor air
Wildfire smoke is a real concern for mountain households, and the HVAC system can either help or make things worse. A loose return duct in a crawlspace or attic can pull outside air straight into the house. A thin filter may let fine particles pass through. We approach air quality as a whole-system job.
- Sealing return ducts and the furnace or air handler cabinet so the system filters what it circulates
- Upgrading to a deeper media filter cabinet when the current slot is too thin
- Checking static pressure so a higher-rated filter does not choke the blower
- Cleaning ducts where dust, debris or rodent nesting material has built up
- Setting the fan to circulate and filter during smoky days without overworking the system
Repairs that keep the heat on
Most of our winter calls in Lexington Hills come down to a handful of causes: a failed hot surface igniter, a dirty flame sensor, a clogged filter that trips a limit switch, a weak inducer motor or a blocked condensate drain on a high-efficiency furnace. Power blips during storms can also scramble thermostats and control boards. We test each component, show you what failed and fix it with parts matched to your equipment.
Some hill homes still rely on an older wall heater or floor furnace for part of the house. Those units need careful inspection of the gas valve, venting and clearances, and we will tell you plainly if one should be retired.
Heat pumps and mini-splits in the hills
Lexington Hills is in Santa Clara County, so Bay Area Air District rules apply. Under Rule 9-4, natural gas furnaces manufactured from 2029 must meet a zero-NOx emission standard, which in practice points homeowners toward heat pumps when a furnace is replaced after that date. Working equipment does not need to be pulled out early.
A heat pump can work well in the hills if it is sized to the real heat loss of the house and paired with sensible backup heat for the coldest nights. Ductless mini-splits are useful where ductwork is poor, for a studio or workshop, or to warm the main living space efficiently. For incentives, check BayREN and your local clean energy provider, and we will confirm the current offer since programs change by funding cycle. The federal 25C credit ended for heat pumps placed in service after 2025.
Before the rains: a pre-season checklist
A fall maintenance visit is the best way to avoid a cold-night breakdown. We inspect burners, igniters and heat exchangers, test safety controls, check gas pressure, clear outdoor units of leaves and needles, flush condensate lines and confirm the thermostat is reading correctly. If you have a heat pump, we also test the defrost cycle and backup heat.
To plan the trip, tell us your road and any gate or driveway notes. We schedule hill visits alongside work in Los Gatos, Monte Sereno, Saratoga, Campbell and Cupertino so we can give you a dependable window.