When your furnace quits during a cold Vallejo night, you need more than just a patch job. You need someone who shows up fast, diagnoses the real problem, and fixes it right the first time.
That’s what you get with our heating repair service. Most repairs happen during the first visit because our trucks carry the parts your furnace actually needs. You’re not waiting days for an order to come in while your family bundles up indoors.
And once your heat’s back, we make sure your system runs efficiently. A furnace that’s been properly serviced uses less energy, which means lower bills through winter. We’ve seen homeowners cut heating costs by up to 40% just by fixing airflow issues and tuning combustion settings. You get comfort now and savings later.
Hot & Cold HVAC has been serving Bay Area homeowners for nearly two decades. Every technician on our team holds a valid HVAC Pro License and full liability insurance coverage, so you’re protected when we’re working in your home.
We started this company because too many people in Vallejo were getting hit with surprise charges and sloppy work from contractors who didn’t care. We built our business differently: transparent pricing, quality repairs, and techs who understand what furnaces go through in this climate.
Vallejo’s winters are short but cold and wet, with temps dropping to 40°F regularly. Your furnace works hard during those months, and when it fails, you need someone local who can respond fast. We’re here 24/7 for emergencies, and we treat your home the way we’d treat our own.
First, you reach out by phone or text at (916) 519-1248. We’ll ask a few questions about what’s happening with your furnace—no heat, strange noises, pilot light issues—so we know what to bring.
Then we schedule a time that works for you, often same-day if it’s an emergency. Our tech arrives in a fully stocked truck with the tools and parts needed for most common furnace problems. Before any work starts, you get upfront pricing. No hidden fees, no surprise charges later.
Once you approve the estimate, we get to work. We diagnose the issue, replace faulty parts, test the system, and make sure your heat’s running properly before we leave. Most jobs wrap up in one visit. If your furnace needs a part we don’t have on the truck, we’ll tell you exactly when it’ll arrive and what it costs.
After the repair, we walk you through what we did and answer any questions. You’ll know what failed, why it failed, and what you can do to prevent it next time.
Ready to get started?
Every furnace repair starts with a full system diagnostic. We check your thermostat, inspect the ignition system, test airflow, examine the heat exchanger, and look for any safety issues like gas leaks or carbon monoxide risks.
If your furnace isn’t producing heat, we troubleshoot the igniter, flame sensor, or gas valve. If it’s making banging or rattling noises, we inspect the blower motor, belts, and ductwork. If it’s cycling on and off constantly, we check the thermostat calibration and airflow restrictions.
Vallejo homeowners deal with specific challenges during winter. The wet season from November through February puts extra strain on furnaces, especially if your system’s older or hasn’t been maintained. We see a lot of calls for furnaces that run but don’t heat efficiently—usually caused by clogged filters, blocked vents, or failing limit switches.
We service all major furnace brands, so whether you’ve got a Carrier, Trane, Lennox, Rheem, or Goodman system, our techs know how to fix it. And because we’re local to the Bay Area, we understand what furnaces in this region go through and what parts fail most often.
Furnace repair costs in Vallejo typically range from $150 to $600 depending on what’s broken. A simple fix like replacing a flame sensor or thermostat runs on the lower end. More complex repairs like a failed heat exchanger, blower motor, or gas valve cost more.
You’ll get an upfront estimate before any work starts, so there’s no guessing. We don’t charge extra for after-hours or weekend emergency calls—the repair price is the repair price.
The biggest factor in cost is whether we catch the problem early or wait until something major fails. A $200 repair now can prevent a $4,000 furnace replacement later. That’s why we recommend annual furnace maintenance, especially before Vallejo’s wet winter season hits.
If your furnace is under 15 years old and the repair costs less than half the price of a new system, repair usually makes sense. If it’s over 20 years old, breaks down frequently, or needs a major component replaced, replacement might be smarter.
Here’s what we look at: age of the unit, frequency of repairs over the past few years, efficiency rating, and whether parts are still available. Older furnaces run less efficiently, so even if they’re working, you’re paying more each month to heat your home.
We’ll give you honest advice either way. If your furnace has years of life left, we’ll fix it and keep it running. If you’re throwing money at a dying system, we’ll tell you that too. You’ll get the information you need to make the right call for your home and budget.
The most common issue we see is a furnace that won’t ignite. This usually comes down to a faulty igniter, dirty flame sensor, or gas valve problem. It’s especially common in furnaces that sit unused through Vallejo’s long, warm summers and then struggle to fire up when temperatures drop.
Another frequent problem is short cycling—when your furnace turns on and off constantly without heating your home. This is often caused by a clogged air filter, blocked vents, or a thermostat that’s reading temperatures incorrectly.
We also get a lot of calls about strange noises. Banging sounds usually mean there’s an issue with the blower assembly or ductwork expanding and contracting. Rattling often points to loose panels or a failing motor. Squealing typically means a belt or bearing needs attention. None of these should be ignored because small problems turn into expensive ones fast.
Yes. We offer 24/7 emergency furnace repair throughout Vallejo and the surrounding Bay Area. If your heat goes out in the middle of the night or on a weekend, you can reach us by phone or text at (916) 519-1248.
Most emergency calls get same-day service. Our techs drive fully stocked trucks, so we can handle the majority of repairs during the first visit without waiting on parts. We don’t charge extra fees for after-hours or weekend emergency service—you pay for the repair, not the time of day.
Furnace emergencies are stressful, especially if you’ve got kids, elderly family members, or health conditions that make cold temperatures dangerous. We take those calls seriously and do everything we can to get your heat back on as quickly as possible.
You should schedule furnace maintenance once a year, ideally in early fall before you need to start using your heat regularly. Vallejo’s heating season runs roughly from November through February, so getting your furnace serviced in September or October sets you up for a problem-free winter.
Annual maintenance includes cleaning the burners, checking the ignition system, testing safety controls, inspecting the heat exchanger for cracks, replacing the air filter, and making sure your thermostat is calibrated correctly. These steps catch small issues before they turn into breakdowns.
Regular maintenance also keeps your furnace running efficiently. A well-maintained system uses less energy, which can save you up to 40% on heating costs over the season. And because most furnace failures happen during the coldest weeks of the year, a fall tune-up means you’re far less likely to lose heat when you need it most.
Yes. We service all major furnace brands including Carrier, Trane, Lennox, Rheem, Goodman, York, Amana, Bryant, and more. Our techs are trained to work on gas furnaces, electric furnaces, and heat pump systems.
Whether you’ve got a single-stage, two-stage, or variable-speed furnace, we have the experience and tools to diagnose and repair it. We also work on both residential and light commercial heating systems.
If your furnace is older or uses a less common brand, we can still help. We have access to a wide parts network and can source components for most systems. In the rare case that parts are no longer available, we’ll let you know upfront and discuss your options for replacement.
Local Resources
Useful Links
Other Services we provide in Vallejo
