24/7 Emergency · Castro Valley, CA · P2
Furnace & heating repair in Castro Valley — same-day, often within the hour. One vetted local crew, not a shared call-center lottery.
When your heat quits, you don't have time to be sold to four companies and chased by all of them. East Bay HVAC Pros dispatches one vetted local crew to Castro Valley — fast, upfront, and yours exclusively.
Send the form above and one local crew calls you back — usually within minutes.
Furnace not starting at all? Work through the nine checks first: Furnace not turning on.
Furnace running but the air is cold? Start with the fan setting: Furnace blowing cold air.
Banging, squealing or rattling? Match the sound to the fault: Furnace making a noise.
Furnace starting then stopping? Time the cycle, that is the diagnosis: Furnace keeps shutting off.
Public record
California licenses this trade as a C-20 — warm-air heating, ventilating and air-conditioning. In the Contractors State License Board register for Alameda County, 8 active C-20 licences give a Castro Valley business address as of 2026-09-02, out of 260 across the county. That is a middling bench — enough choice to be selective, few enough that the good ones are booked solid in the first heatwave.
5 hold the C-20 on its own; the other 3 also carry a general building or plumbing classification. A C-20-only shop does this work all day, which is worth knowing when two quotes look the same on paper.
By business structure the Castro Valley list runs 4 sole owners, 3 corporations, 1 limited-liability company. Sole owners lead the list, which usually means the person who quotes the job is the person who does it.
Those addresses sit in 2 ZIPs: 94546 (7), 94552 (1). 94546 alone accounts for 7 of the 8. We cover all of them.
CSLB issues licence numbers in sequence, so the register doubles as a record of how long the trade has been established here. The longest-held active C-20 in Castro Valley is number 603913; its newest is 1145723. Across the whole county the range runs 68847 to 1159177, so Castro Valley's oldest surviving licence sits in the middle of it — an established local trade without the county's oldest names.
That register is how we decide who gets your request: an active, unexpired licence, and a preference for the C-20-only shops. 3 of the Castro Valley licences come up for renewal before the end of 2026, and a lapsed licence is uninsurable — one more reason to check the number rather than the van. Check ours, or anyone's, yourself — every California licence is public at the CSLB licence lookup. A contractor who will not give you a licence number has told you what you need to know.
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