You stop waking up to a cold house. Your energy bill drops because the system isn’t fighting itself to keep up. The weird smell goes away. That rattling noise stops.
When your furnace runs the way it should, you’re not layering up indoors or worrying whether it’ll make it through the next cold snap. Moraga winters aren’t brutal, but when that fog rolls in off the hills and temperatures drop into the 30s overnight, you notice fast if your heat isn’t working.
A properly repaired furnace doesn’t just warm your house. It runs quieter, cycles less, and uses less energy to do it. Most people see the difference on their next PG&E bill.
Hot & Cold HVAC serves Moraga and the surrounding Contra Costa County area with licensed heating repair. We’re based in Sacramento County, but we cover the East Bay because the work matters and the need is real.
Our technicians hold California C-20 HVAC licenses and EPA certifications. We carry full liability insurance and workers’ comp. That’s not marketing—it’s the baseline for doing this work correctly.
Moraga homes run the range from newer builds in Rheem Valley to older ranch-styles tucked into the hills. We’ve worked on forced-air systems, heat pumps, and older furnaces that haven’t been touched in years. The terrain here means some homes sit in microclimates that put extra strain on HVAC equipment, especially when the marine layer settles in.
You call or text (916) 519-1248. We ask a few questions—what’s happening, how old is the system, when did it stop working. That helps us know what to bring.
We schedule same-day service in most cases. Our trucks stock the common parts for Trane, Carrier, Lennox, Rheem, Goodman, York, and other major brands. If it’s an emergency and you have no heat, we prioritize it.
When we arrive, we run a full diagnostic. We check the thermostat, inspect the ignition system, test the blower motor, examine the heat exchanger for cracks, and measure airflow. We’re looking for the actual problem, not just the symptom.
Once we find it, we explain what’s wrong in plain terms. We tell you what it costs to fix before we do anything. If it’s a part that’s failed, we replace it. If it’s a maintenance issue, we handle it. Most repairs finish the same day.
After the repair, we test the system through a full cycle to make sure it’s heating correctly and safely. Then we’re done.
Ready to get started?
Every service call starts with a diagnostic. We don’t guess. We test voltage, check gas pressure if it’s a gas furnace, inspect the flame sensor, and measure temperature rise across the heat exchanger.
Common repairs include replacing faulty igniters, cleaning or replacing flame sensors, fixing blower motor issues, replacing capacitors, repairing thermostat wiring, and addressing airflow restrictions. If your furnace isn’t lighting, cycles on and off constantly, or blows cold air, those are all fixable problems in most cases.
Moraga’s climate is mild compared to Sacramento, but the fog and moisture can cause issues with electrical components over time. Homes near the hillsides or closer to the reservoir sometimes deal with more humidity, which affects how furnaces age. Older systems that haven’t had regular furnace maintenance tend to fail when you need them most—right when that first cold front moves through.
We also handle furnace tune-ups and preventive maintenance. A tune-up includes cleaning the burners, checking all electrical connections, lubricating moving parts, testing safety controls, and replacing the air filter. It’s not glamorous, but it’s the difference between a furnace that lasts 12 years and one that makes it to 20.
Most furnace repairs in Moraga run between $200 and $600 depending on what’s broken. A simple fix like a flame sensor or igniter replacement usually sits on the lower end. Blower motor or control board replacements cost more.
We give you the price before we start the work. No surprises, no “we’ll see when we get in there” pricing. You’ll know what it costs, and you decide whether to move forward.
If your furnace is older than 15 years and needs a major repair, we’ll also talk through whether replacement makes more sense. Sometimes it does. Sometimes it doesn’t. We’re not here to sell you a new system if a $300 repair buys you three more years.
Yes. Most days we can get to Moraga the same day you call, especially if it’s an emergency and your heat is completely out.
Our trucks are stocked with the most common parts for major furnace brands. That means we can usually complete the repair on the first visit without needing to order parts and come back later.
If you call early in the day, your chances of same-day service go up. If you call later in the afternoon or evening, we’ll do our best to fit you in, but it depends on how the schedule looks. Either way, we’ll be straight with you about timing when you call.
The most obvious sign is no heat. But there are earlier warnings that tell you something’s wrong before it fails completely.
If your furnace is cycling on and off more than usual, that’s a problem. If it’s making loud banging, squealing, or rattling noises, something’s loose or worn out. If you smell gas or notice a persistent burning smell, shut it off and call immediately.
Other signs include weak airflow from the vents, the blower running constantly, yellow flames instead of blue, or your energy bills climbing without explanation. A lot of people ignore these signs until the system quits entirely, usually on the coldest night of the year. Catching it early almost always costs less to fix.
Most repairs take one to three hours depending on what’s wrong and how accessible the furnace is.
Simple fixes like replacing an igniter or flame sensor usually take under an hour. Blower motor replacements or control board swaps take longer, sometimes two to three hours. If we need to access a furnace in a tight attic or crawlspace, that adds time.
We don’t rush the work. A furnace repair done right the first time means you’re not calling us back next week because something else failed. We test everything before we leave to make sure it’s heating correctly and safely.
Yes. We work on all major brands including Trane, Carrier, Lennox, Rheem, Goodman, York, Bryant, Amana, and others.
Each brand has its quirks, but the fundamentals are the same. Our technicians have seen enough systems over the years to diagnose and repair just about anything that comes up.
If you have an older or less common brand, we can usually still help. The parts might take an extra day to source, but we’ll let you know upfront if that’s the case. Most of the time, we have what we need on the truck.
It depends on the age of your furnace, the cost of the repair, and how much life is left in the system.
If your furnace is under 10 years old and the repair costs less than a third of what a new system would cost, repair usually makes sense. If it’s over 15 years old and needs a major repair like a heat exchanger or full blower assembly, replacement often makes more financial sense.
We’ll walk through the math with you. A new furnace costs between $3,500 and $7,000 installed depending on the size and efficiency. If you’re looking at a $1,500 repair on a 17-year-old system, you’re probably better off replacing it. But if it’s a $400 fix on a 12-year-old furnace that’s been maintained, you’ve likely got several good years left.
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