Heating Repair
Bay Area's #1 Choice

A furnace that won’t produce heat, a system short-cycling every few minutes, a noise that shouldn’t be there – that’s heating repair, and United HVAC, Plumbing & Electrical handles it across San Jose, Santa Clara, and Cupertino with same-day dispatch. Anything touching gas or combustion gets treated as a safety call first. Comfort comes second. 

What Does Professional Heating Repair Cover and When Do You Need It?

Heating system repair covers everything from a furnace that runs but never gets warm to a heat pump blowing cold air on the heat cycle. Combustion-related failures get treated differently than mechanical ones, since a gas system carries risks an electric heat pump simply doesn’t.

Most Common Heating Problems We Diagnose and Fix

Several failures show up more than others across Bay Area heating systems:

• Cracked heat exchanger – common in older gas furnaces, and the reason a furnace gets shut down rather than patched: a crack here risks carbon monoxide escaping into the home’s air supply.
• Failed reversing valve – the usual explanation when a heat pump blows cold air instead of heat, since the valve gets stuck routing refrigerant the wrong direction.
• Capacitor or defrost board failure – heat pumps see this most during Bay Area cold snaps, when the compressor draws harder and a weak capacitor can’t deliver the start it needs.
• Pilot light or igniter failure – still common in older furnaces, showing up as a system that won’t ignite or won’t stay lit.
• Combustion issues generally – anything affecting how fuel burns inside the unit carries a carbon monoxide risk, which is why combustion problems get flagged and addressed immediately rather than scheduled for later.

When Repair Makes Sense vs. When to Replace

A furnace with a failed igniter or a heat pump with a bad capacitor is almost always worth repairing – both are isolated, serviceable parts. A cracked heat exchanger is different: that’s not a component you patch, since the safety risk means the furnace gets replaced rather than repaired. Real heating service repair means telling you plainly which category your system falls into before any work starts.

Heating Repair: How the Process Works

Most heating repair services calls start with a diagnostic pass – checking combustion, airflow, and electrical components in sequence – before any part gets touched. A single failed component usually gets resolved in one visit, which is the standard for a same-day heating repair service call.

Diagnostic Assessment: What the Technician Checks First

Flue gas analysis comes first on any gas furnace, checking combustion byproducts for signs the system isn’t burning fuel cleanly. Static pressure testing across the duct system flags airflow restrictions that can overwork a blower motor or cause short-cycling. For heating system repair service calls involving a suspected cracked heat exchanger, a camera scope goes into the combustion chamber for a direct visual check – not a guess based on symptoms alone.

Repair or Part Replacement: What Happens Next

Once the failed component is confirmed, the technician quotes the part before touching anything else. An igniter, capacitor, or defrost board typically gets swapped same-visit from stock on the truck – standard for any heating service and repair call handled on-site. A confirmed cracked heat exchanger stops the repair conversation entirely – that furnace gets shut down and the conversation shifts to replacement, since running it further isn’t safe.

Heating Repair Cost in the Bay Area

House heating repair typically runs $89 for a basic diagnostic call up to $3000 for a board or blower motor replacement. Cost depends entirely on which component failed, not on the type of system involved.

Factors That Affect the Final Price

An igniter or pilot light repair runs $350 to $600. A capacitor or defrost board swap on a heat pump runs $300. A blower motor or limit switch repair runs $200 to $500. A heat exchanger inspection with a camera scope runs $300 – separate from the cost of replacing the furnace entirely if that inspection turns up a crack.

How Preventive Maintenance Reduces Emergency Repair Costs

A weakening capacitor or an igniter nearing failure almost always shows up on a routine seasonal check before it fails outright during a cold snap. Catching it in fall costs a fraction of an emergency call in the middle of a January cold spell.

Why Bay Area Homeowners Choose United HVAC, Plumbing & Electrical for Heating Repair

Home heating system repair should come from a company that treats a combustion issue as urgent, not routine – the difference matters more here than with almost any other home system.

Licensed, Insured, and Local

As a licensed heating repair company, United HVAC, Plumbing & Electrical holds California license #1061226 and carries bonded and insured coverage up to $2M. If accessing a unit or ductwork damages property during a repair, that’s covered without a separate claim – and every combustion-related finding gets documented.

25+ Years Repairing Heating Systems Across the Bay Area

Our founder brings 25+ years of hands-on HVAC experience, and the company has handled emergency heating calls across San Jose, Santa Clara, and Cupertino since 2019. That range covers older furnaces with original heat exchangers still in service and newer heat pumps under manufacturer warranty alike.

Same-Day Emergency Service With Upfront Pricing

Emergency heating repair calls typically get same-day dispatch, with average response under 60 minutes once a technician is en route. Every repair comes with a written estimate before work starts and a 100% satisfaction guarantee – if the same issue returns, we come back at no charge.

Heater not coming on or blowing cold air? Call United HVAC, Plumbing & Electrical at (408) 539-6936 – same-day emergency response across the Bay Area.