The short answer
Heating repair in Los Altos Hills often means sorting out complex setups that mix furnaces, hydronic radiant systems, heat pumps and ductless units. Separating equipment faults from distribution and control problems is the fastest route to a lasting fix.
Heating systems in Los Altos Hills cover a wide range. One property may combine a forced-air furnace in the main house, a hydronic boiler feeding radiant floors in a newer wing and a ductless heat pump in a detached studio. When something goes wrong, the first job is figuring out which piece failed and whether the problem is the equipment, the distribution or the controls tying it all together. EliteAir Heating & Cooling repairs heating equipment throughout 94022, driving in from San Jose about 13 miles to the east. This guide explains how we think about heating problems in larger, more complex homes.
Equipment, distribution or controls?
Nearly every heating complaint falls into one of three buckets. Equipment problems mean the heat source itself is not producing heat: a furnace that will not light, a boiler that locks out, a heat pump stuck in defrost. Distribution problems mean heat is made but does not reach the room, perhaps from a collapsed duct, an air-bound radiant loop or a failed circulator pump. Control problems mean the system never gets the right signal, from a dead thermostat, a failed zone valve or a wiring fault.
Sorting the complaint into one of those buckets early saves time. A house where every zone is cold points to the heat source or main controls. A single cold room in an otherwise warm house usually points to distribution or a zone control.
Radiant and hydronic systems
Hot water heating systems are quiet and even, but they have their own failure points. We troubleshoot boilers and the hydronic components around them, including:
- Boiler ignition and lockout faults, with the error history read from the control
- Circulator pumps that hum but do not move water, or that have seized after a long summer off
- Zone valves stuck open or closed, causing some rooms to overheat while others stay cold
- Air trapped in loops, which produces gurgling sounds and cool sections of floor
- Low system pressure from small leaks, a failing pressure relief valve or an expansion tank that has lost its charge
- Mixing valves that deliver water too hot or too cool for radiant floors
Forced air and heat pump systems
For furnaces, we test ignition, flame sensing, pressure switches, limits and the blower, and we check venting and carbon monoxide on every visit. For heat pumps, we confirm the reversing valve shifts, defrost cycles start and end correctly, refrigerant charge is right and backup heat engages only when it should. Ductless units get their stored error codes read, along with a look at filters, coils and condensate drainage.
In large homes with long duct runs through attics and crawlspaces, distribution often hides the real problem. Measuring supply temperatures at the registers farthest from the equipment tells us whether heat is being lost in transit.
Thermostats deserve their own mention. Larger homes often carry a mix of thermostats added over different remodels, some programmable, some smart, some decades old, and they do not always talk to the equipment the way they should. A smart thermostat wired without a common wire, a heat pump thermostat set up as if it were controlling a furnace, or a zone panel that lost its settings after a power outage can all look like an equipment failure. We check controls early in the visit so nobody replaces a working furnace part because of a thermostat setting.
Old equipment and the rules ahead
Repairing an older gas furnace or boiler is often perfectly sensible. Bay Area Air District appliance rules do not require replacing working equipment; they apply only when an existing furnace or water heater fails or is replaced. Looking further out, Rule 9-4 sets a zero-NOx standard for natural gas furnaces manufactured from 2029, which in practice steers furnace replacements toward heat pumps.
If a major repair comes up on aging equipment, we explain the remaining life you can expect and what an electric alternative would involve for that zone, so a decision can be made calmly instead of during a cold spell.
Making the visit efficient
Properties in the hills can mean gates, long drives and equipment in several outbuildings. Telling us which zones are affected, where the mechanical rooms or attic hatches are, and how to get through any gate keeps the visit focused on the repair. If you smell gas or a carbon monoxide alarm sounds, leave the building first and contact the gas utility or emergency services before anything else.
Besides Los Altos Hills, we repair heating systems in Los Altos, Mountain View, Cupertino, Sunnyvale and Saratoga.
More services in Los Altos Hills
- AC Repair in Los Altos Hills
- Heat Pump Installation in Los Altos Hills
- AC Installation in Los Altos Hills
- Furnace Repair in Los Altos Hills