Alameda County, California
Heating and AC repair in Union City, CA
Call and describe the problem, whether the furnace will not light, the heat pump is iced over or the air conditioner is blowing warm air, and you will be connected with an independent HVAC contractor serving Union City.
Your call is connected to an independent HVAC contractor, subject to availability in your area. HVAC Nation may receive compensation when your call is connected with a participating provider. Providers are independent businesses.
Union City at a glance
Heating and cooling climate
NOAA's 1991–2020 climate normals for the FREMONT, CA station (about 4 miles away) show about 2,374 heating degree days and 391 cooling degree days in a typical year, with about 3 nights at or below freezing and 12 days reaching 90°F or more. Heating demand is far larger than cooling demand here, so the furnace, boiler or heat pump carries most of the load and a breakdown in a cold snap is the most pressing kind of call.
How homes in Union City are heated
According to the Census Bureau's American Community Survey, 66% of occupied homes in Union City heat mainly with utility gas and 30% with electricity. Gas-fired furnaces and boilers are the most common setup, which means igniters, flame sensors, gas valves and venting come up often on heating calls.
Housing age and HVAC systems
The median year built for housing in Union City is 1980, and about 52% of its 21,901 housing units were built before 1980. Homes from this era commonly have forced-air furnaces with ductwork, and many have had the original furnace and air conditioner replaced at least once.
Services most relevant in Union City
- Furnace Repair (68% of homes heat with gas, propane or oil)
- Heat Pump Repair (30% of homes heat with electricity)
- AC Repair (about 12 days a year at 90°F or more)
- AC Replacement (median home built in 1980, many systems on their second or third AC)
- HVAC Repair (one call when you are not sure which part failed)
Owners, landlords and tenants
About 65% of occupied homes in Union City are owner-occupied and 35% are rented. Homeowners, landlords and property managers can call to be connected; tenants should contact their landlord or property manager about heating or cooling problems first.
Nearby places
Union City is in Alameda County. Places within about 30 miles include San Jose (24 mi), Oakland (16 mi), Fremont (9 mi), Hayward (5 mi) and Sunnyvale (15 mi).
Other California locations
Menlo Park (11 mi), Morgan Hill (39 mi), Gilroy (48 mi), Pacific Grove (68 mi), Soledad (90 mi), Corcoran (172 mi), Camarillo (287 mi), Moorpark (289 mi), Calabasas (304 mi), Hermosa Beach (328 mi), Temple City (328 mi), Maywood (329 mi), Redondo Beach (329 mi), Azusa (332 mi), Baldwin Park (332 mi), Torrance (332 mi), Covina (335 mi), La Verne (338 mi), Yucca Valley (395 mi), Cathedral City (406 mi), Santee (434 mi), Brawley (486 mi)
Questions
Is HVAC Nation an HVAC company in Union City?
No. HVAC Nation is a referral service. Calls from Union City are connected to an independent HVAC contractor, subject to availability in Alameda County.
How do most homes in Union City heat?
Census survey data shows about 66% of homes heat mainly with utility gas, 30% with electricity, 1% with propane and 0% with fuel oil.
How cold and hot does it get around Union City?
NOAA normals for the FREMONT, CA station average about 3 nights a year at or below 32°F and 12 days at 90°F or above.
Is a permit needed to replace a furnace or air conditioner in Union City?
Many cities and counties require mechanical or electrical permits for equipment replacement. Check with the local building department for Union City or Alameda County, and ask the contractor.
What should I do if I smell gas?
Leave the home right away without using switches or phones inside, then call the gas utility emergency line or 911 from outside.
Sources: U.S. Census Bureau Vintage 2024 population estimates; American Community Survey 2020–2024 5-year (tables B25040 house heating fuel, B25034, B25035, B25003); 2024 Gazetteer; NOAA NCEI U.S. Climate Normals 1991–2020 (heating and cooling degree days, base 65°F).