My furnace is blowing cold air — what should I check?

First check: thermostat set to HEAT (not COOL or FAN). Then check the air filter — a clogged filter can cause overheating and safety shutdown. If those are fine, it could be a flame sensor, igniter, or gas valve issue. We can diagnose the same day.

How much does furnace repair cost in Redwood City?

Diagnostic starts at $89. Most repairs are $150–$600. Igniter or flame sensor: $150–$300. Blower motor: $400–$800. Heat exchanger: $800–$2,500 (often worth replacing the unit at that point). Upfront pricing always.

Should I repair or replace my old furnace?

Under 15 years with a minor issue — repair. Over 20 years, cracked heat exchanger, or R-22 heat pump — replacement makes sense. California rebates for high-efficiency systems can offset 15–30% of replacement cost.

25–35 min from Los Gatos HQ

Furnace Repair
Redwood City, CA

Redwood City may have the “best climate,” but winter mornings in the 30s–40s and damp Peninsula air still demand reliable heating. Palm Park and Roosevelt neighborhoods have furnaces from the 1950s–1970s era that are well past recommended lifespan. We repair and advise on every furnace type found in Redwood City — same-day when heat is out.

(408) 581-2241

25–35 minFrom Los Gatos HQ

5.0 ★Google Rating

Same DayEmergency Service

C-20 & C-38Dual Licensed

C-20 HVAC License EPA 608 Certified NATE Certified

Furnace Repair in Redwood City: Reliable Heat for Peninsula Winters

Redwood City’s older neighborhoods — Palm Park, Roosevelt, Stambaugh, and the streets near Sequoia High School — have postwar homes with furnaces that may be original or once-replaced. After 25–30 years, the failure list is familiar: cracked heat exchangers, worn blower bearings, failed ignitors, corroded gas valves. The damp Peninsula climate accelerates corrosion on components that would last longer in drier areas.

Mount Carmel, Woodside Plaza, and the areas near Edgewood Park have slightly newer housing with more modern forced-air furnaces. These systems are generally in better shape but still need periodic service — flame sensors that carbon up, blower capacitors that weaken, and condensate drains that clog on high-efficiency units.

Redwood Shores has the newest housing stock and most modern heating equipment. However, the bayfront location adds moisture that can corrode outdoor electrical connections and affect combustion air quality in some configurations.

Furnace Types in Redwood City

Gas forced-air: Standard in most Redwood City homes. Details.

High-efficiency condensing: Newer homes, Redwood Shores area.

Commercial heating: Stambaugh-Heller, Woodside Road, downtown. Commercial HVAC.

Furnace Repair Costs in Redwood City

Diagnostic / Service Call $89–$150

Ignitor or Flame Sensor $150–$350

Blower Motor $400–$900

Gas Valve $350–$700

Heat Exchanger Inspection $150–$300

Residential furnaces in Redwood City. Diagnostic applied toward repair. 25–35 min from Los Gatos.

Why Us

Why Redwood City Calls North Breeze for Furnace Repair

Damp Climate Expertise

Peninsula moisture accelerates furnace corrosion. We know what to look for and address it before it becomes a safety issue.

CO Testing Every Call

Carbon monoxide testing on every furnace repair. Heat exchanger camera inspection when age or symptoms warrant it.

Same-Day Winter Service

25–35 min from Los Gatos. Winter furnace emergencies get same-day response.

All Heating Types

Forced-air, wall heaters, radiant, commercial RTU heating. Redwood City’s full range covered.

FAQ

Furnace Repair Redwood City — Common Questions

Does the Peninsula’s damp air affect my Redwood City furnace?

Yes. Higher moisture levels accelerate corrosion on gas valve connections, burner assemblies, and heat exchanger surfaces. Annual maintenance that includes inspection and cleaning of these components is more important on the Peninsula than in drier inland areas.

My Palm Park furnace is 25+ years old but still runs — should I replace it?

If it’s running safely (intact heat exchanger, proper venting, acceptable CO levels), a well-maintained furnace can run beyond its expected lifespan. However, we recommend annual heat exchanger inspection for any furnace over 20 years. If a major component fails ($800+), replacement usually makes more economic sense at that age.

Do you service the heating systems in Stambaugh-Heller commercial buildings?

Yes. Warehouse unit heaters, rooftop heating sections, makeup air units — all covered under our C-20 commercial license. Stambaugh-Heller, the port area, and Woodside Road commercial properties are all in our regular service territory.