These guides answer the questions homeowners in East San Jose, Alum Rock and East Foothills ask before and after a service call: which system to choose, what to do between visits, and what to do when something goes wrong. Each one gives the short answer first, then the details, and says plainly where a homeowner’s part ends and a technician’s begins.
The four guides
Heat pump vs. air conditioner. If your AC or furnace is near the end of its life, this is the decision in front of you. The guide compares the two for inland summers that need real cooling and winter nights that need steady heat, explains how each fits an existing furnace and duct system, and gives the installed price ranges we publish.
How often to change your HVAC filter. The cheapest maintenance there is, and the one most often skipped. It covers how often to change a MERV 8 filter, when a higher rating makes sense, why dusty summers and smoke days shorten the schedule, and filters in commercial systems.
HVAC emergency: what to do before the technician arrives. Step by step for the calls nobody plans for: the AC quitting during a heat wave, no heat on a cold night, a water leak, alarming noises, a gas odor or a carbon monoxide alarm. It covers what to check, what to switch off and how to keep people safe.
Thermostat troubleshooting. A homeowner’s checklist by thermostat type: batteries, mode and settings, the breaker, schedules, and smart-thermostat wiring, including the C-wire. If the checklist does not solve it, thermostat not working explains when the fault is in the system or the wiring and what a technician does next.
More reading
Older articles from our blog cover related topics:
- Choosing and living with equipment: ductless mini-splits, HVAC zoning, smart thermostats and when to replace a system by age.
- Upkeep and savings: energy-saving tips, winterizing your HVAC and signs your HVAC needs repair.
- Air and odors: improving indoor air quality, wildfire smoke and your HVAC, furnace smells and why an AC freezes up.
Where to go next
The guides help you decide and maintain. If something is already wrong, the troubleshooting pages go symptom by symptom. If you know what you need, the services pages explain how each job is done. Either way, you get the price before any work begins.