The short answer
ClearSky repairs furnaces, heat pumps, ductless systems and wall heaters in Campbell. We trace cold rooms, weak airflow and heat pump defrost or auxiliary heat problems to the actual cause, then explain the fix before starting.
Heating repair in Campbell covers more ground than people expect. On one street you might find a gas furnace in the garage, a heat pump that replaced it last year, a ductless head warming a back bedroom, and an old wall heater still doing duty in a cottage-style rental. Each fails in its own way. ClearSky Heating & Cooling repairs all of these systems for homeowners in 95008, traveling about eight miles south from San Jose. This page is organized around the questions we hear on real calls: why one room stays cold, why a heat pump blows cool air in winter, and what information helps us arrive ready to fix the problem the first time.
Heat pump blowing cool air? Start here
As more Campbell homes move to heat pumps, we get more winter calls from owners who think their new system has failed. Sometimes it has. Often it is doing what heat pumps do. Air from a heat pump register feels warm, not hot, because it is delivered at a lower temperature than gas heat. On damp mornings, the outdoor unit also pauses heating to run a defrost cycle; it may steam and the indoor air may feel cool for a few minutes.
Real faults look different. Defrost that never ends, an outdoor unit caked in ice, a reversing valve stuck in cooling mode, auxiliary heat strips running constantly, or a thermostat configured for the wrong equipment type all need a technician. We check refrigerant pressures in heating mode, test the reversing valve and defrost controls, and confirm the thermostat settings match the system.
One cold room, a warm hallway
Uneven heat is one of the most common complaints in older Campbell homes, and the equipment is usually not the culprit. Ducts that run through an uninsulated attic lose heat before air reaches the far end of the house. A flex run can collapse behind a joist, a register boot can detach, or a bedroom with its door closed may have no path for air to return.
We measure supply temperatures at each register and compare them with the temperature leaving the furnace or air handler. A big drop points to the ducts. From there, the fix may be sealing and insulating a run, adding a return grille, or balancing dampers so the system stops overheating the rooms nearest the equipment.
- Rooms over the garage or in additions often sit at the end of the longest duct run
- Closed bedroom doors without return paths can cut airflow sharply
- Disconnected ducts in the attic heat the attic, not the house
- Furniture or rugs covering a floor register can starve a room
Older equipment we still repair
Not every Campbell home has central heat. Gas wall furnaces and floor furnaces still appear in smaller houses and older rentals. We repair thermocouples, pilot assemblies, gas valves and venting on these units, and we check the combustion area carefully because older designs have fewer safety controls than modern furnaces.
When a wall unit or very old furnace keeps failing, we give you an honest comparison with a ductless heat pump, which can heat the same space without new ducts. The Air District rules do not require you to replace working equipment, so the choice is about comfort and reliability rather than a mandate. For furnaces, though, keep in mind that gas models manufactured from 2029 must meet a zero-NOx standard under Rule 9-4, which steers future replacements toward heat pumps.
What helps us fix it on the first visit
A few details shared when you book make a real difference. Tell us what type of heating you have, if you know it, and where the equipment sits: garage, hallway closet, attic or crawlspace. Mention any error code or flashing light on the unit, unusual sounds such as squealing, banging or repeated clicking, and whether the problem started suddenly or crept in over several days.
If you smell gas, leave the home and contact your gas utility from outside first. If a carbon monoxide alarm sounds, get everyone out and call emergency services. Heating equipment can be repaired once the house is safe.
Heating repair beyond Campbell
The same technicians handle heating calls in Los Gatos, Monte Sereno, Saratoga, Cupertino and Santa Clara. Foothill neighborhoods tend to see colder nights than the valley floor, so systems there carry a heavier winter load and benefit from a fall check.
More services in Campbell
- AC Repair in Campbell
- Heat Pump Installation in Campbell
- AC Installation in Campbell
- Furnace Repair in Campbell