Furnace Repair

Zuzu Plumbing Heating and Air provides fast and safe furnace repair services. When you need expert furnace repair in Modesto, CA, our team is ready to help 24/7.

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Top Furnace Repair in Modesto, CA

A broken furnace on a cold day is more than an inconvenience; it is a critical issue that needs immediate attention. Zuzu Plumbing Heating and Air specializes in fast, reliable furnace repair to restore warmth and safety to your home. With 25 years of experience, owner Jay Nino leads a team of experts who can diagnose and fix any furnace problem, from ignition issues to motor failures. We prioritize safety above all, especially with gas furnaces. Our technicians are available 24/7 for no heat emergencies. All our furnace repairs are backed by a two year warranty. For a five star repair experience you can trust, call Zuzu.

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Maria R.
June 3, 2025

My AC went out during a heatwave, and Zuzu had someone at my house within hours. The tech was professional and explained everything clearly. I’ll definitely use them again.

Alex G.
May 11, 2025

I called around to several HVAC companies, but Zuzu was the only one that answered late at night. They had someone out by morning, and the issue was fixed fast.

Cynthia T.
March 26, 2025

Zuzu installed a new Daikin system for us last month. The whole process was smooth and stress-free. I appreciate that they explained all the options without pressuring us.

Tim B.
August 9, 2024

Our old unit wasn’t cooling the house evenly. Zuzu diagnosed the issue quickly and adjusted the system. It’s been running great ever since.

Robert M.
July 6, 2024

We signed up for their yearly maintenance plan and it’s been worth every penny. Our unit runs better, and they remind us when it’s time for a check-up.

Carlos S.
May 16, 2024

Great experience from start to finish. They were on time, respectful, and the final results speak for themselves. The house cools much faster now.

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Furnace Repair Service

When your furnace stops working in the middle of a Modesto winter, you need a repair service that is both fast and trustworthy. Zuzu Plumbing Heating and Air is dedicated to getting your heating system back up and running as quickly and safely as possible. Furnaces are complex appliances, and a malfunction can stem from a wide range of issues. Our highly trained and experienced technicians have the expertise to work on all makes and models of gas and electric furnaces. We combine advanced diagnostic tools with years of hands on knowledge to accurately pinpoint the problem and provide an effective, long lasting repair.

The furnace repair process at Zuzu begins with a thorough safety inspection and diagnostic check. For gas furnaces, we meticulously check for any signs of gas leaks or carbon monoxide issues. The safety of your family is our foremost concern. Our technicians then move on to diagnosing the specific fault. We test the ignition system, whether it is a pilot light or electronic ignition, check the gas valve, and inspect the burners. We examine all electrical components, including the thermostat, control board, and safety sensors. This methodical approach ensures we find the true cause of the failure.

Some of the most common furnace problems we repair include ignition system failures. This could be a dirty flame sensor that needs cleaning, a faulty hot surface ignitor, or a problem with the pilot light assembly. Another frequent issue is a malfunctioning blower motor. If the motor fails, the furnace may produce heat, but the warm air will not be circulated through your home. We can repair or replace blower motors and their associated components, such as the run capacitor. We carry many of these common parts on our trucks.

Thermostat and control board issues are also common. A faulty thermostat can prevent the furnace from turning on or cause it to cycle improperly. The furnace’s main control board is its brain, and if it fails, the entire system will go down. Our technicians are skilled at diagnosing these complex electronic problems and can repair or replace the necessary components. We also frequently deal with issues related to safety sensors and limit switches, which are designed to shut the furnace down if they detect an unsafe condition.

A properly functioning furnace is critical for your comfort, but more importantly, for your safety. We take every repair seriously, adhering to the strictest safety protocols throughout the service call. We provide clear explanations of the problem and give you a detailed, upfront price for the repair before any work begins. There are no hidden fees or surprises with Zuzu. We believe in honest communication and transparent pricing, allowing you to make an informed decision about your home’s heating system.

We stand behind the quality of our work with an industry leading two year warranty on all completed furnace repairs. This guarantee covers both the parts we install and the labor we perform. It is our promise to you that we provide durable solutions, not just quick fixes. Our commitment to excellence and customer satisfaction has made us a trusted name in Modesto and Stanislaus County for over 25 years. We treat your home with respect and ensure our work area is clean when we leave.

Do not let a broken furnace leave your family in the cold. Whether you are hearing strange noises, smelling unusual odors, or getting no heat at all, the expert team at Zuzu Plumbing Heating and Air is ready to help. Our 24/7 availability for emergency calls means you are never left waiting for a solution. Trust our experience, our commitment to safety, and our dedication to a five star service experience.ce of mind.

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24/7 Emergency Furnace Repair in Modesto, CA

A furnace that fails on a cold winter night is a true emergency. At Zuzu Plumbing Heating and Air, we understand the urgency of a no heat situation. That is why we offer 24/7 emergency furnace repair services throughout the Modesto area. Our technicians are on call around the clock, including all weekends and holidays, to respond to your call. We prioritize emergency calls to ensure a rapid response time. Our goal is to get to your home quickly, diagnose the problem safely, and restore your heat as fast as possible.

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Most Common Furnace Repair Questions

When your furnace breaks down, you need answers fast. Zuzu Plumbing Heating and Air is here to help you understand potential issues with your heating system. Here are the answers to some common questions about furnace repair.

There are numerous reasons why a furnace might run but fail to produce any heat. One of the most common issues is a problem with the ignition system. If you have an older furnace with a standing pilot light, the pilot may have gone out. For newer furnaces with electronic ignition, the hot surface ignitor may have cracked and failed, or the flame sensor may be dirty and unable to detect a flame. When the flame sensor does not work, it will shut off the gas valve as a safety precaution, preventing the furnace from heating.

Another frequent cause is an issue with the gas supply itself. The furnace’s gas valve could be faulty and stuck in the closed position, preventing fuel from reaching the burners. It is also possible that the gas supply to your home has been interrupted. You can check other gas appliances in your home, like your stove, to see if they are working. If they are not, the problem may be with your utility provider. Our technicians can test the gas valve and gas pressure at the furnace to diagnose the issue accurately.

The problem could also be related to the furnace’s safety controls. A furnace has several limit switches that monitor temperature and pressure. If a switch detects an unsafe condition, such as the furnace overheating due to a clogged filter, it will shut down the burners to prevent damage or a fire. Our diagnostic process includes checking all these safety circuits to determine if they are the reason your furnace is not heating. We will find the root cause and resolve it safely.

If you have an older furnace with a standing pilot light and you notice it has gone out, it is the reason your furnace is not producing heat. Many older furnaces have instructions for relighting the pilot printed on a label inside the furnace’s access panel. If you feel comfortable and safe doing so, you can attempt to follow these instructions carefully. The process typically involves turning the gas valve to the “pilot” position, holding down a button to start the flow of gas to the pilot, and using a long lighter to ignite the flame.

Before attempting to relight the pilot, you should first turn the thermostat off and wait at least five to ten minutes. This allows any residual gas that may have accumulated in the combustion chamber to dissipate. This is a critical safety step. When you are ready to relight, if you smell a strong odor of gas, do not proceed. Evacuate your home and call your gas company’s emergency line from a safe distance, then call Zuzu for professional help. Your safety is always the top priority.

If you successfully relight the pilot but it will not stay lit after you release the button, it indicates a problem with a component called the thermocouple. The thermocouple is a safety device that senses the pilot flame and shuts off the gas if the flame goes out. If the thermocouple is faulty, it will not allow the pilot to remain lit. Replacing a thermocouple is a job for a professional technician. If you are not comfortable relighting the pilot or if it will not stay lit, call Zuzu for safe and reliable service.

A loud booming or banging sound when your furnace kicks on can be quite startling, and it is a sign of a potentially dangerous issue known as delayed ignition. This happens when the furnace’s burners do not ignite immediately when the gas valve opens. Instead, gas is allowed to build up inside the sealed combustion chamber for a few moments before it finally ignites. When it does ignite, this small accumulation of gas creates a mini explosion, which is the loud boom you hear. This puts unnecessary stress on your furnace’s components.

The most common cause of delayed ignition is dirty or clogged burners. Over time, soot and debris can block the ports on the burners, disrupting the flow of gas and preventing a smooth and immediate ignition. The flame may not be able to travel across all the burners quickly. Our technicians can solve this problem by removing and thoroughly cleaning the burner assembly, ensuring the flame will light evenly and instantly as it is designed to.

Other potential causes include a weak pilot light, problems with the gas pressure, or a faulty gas valve. If the pilot flame is too small or aimed incorrectly, it may not be able to reliably ignite the main burners. Incorrect gas pressure can also affect the fuel and air mixture, leading to poor ignition. This is a serious issue that should be addressed immediately by a professional. If you hear a loud boom from your furnace, call Zuzu Plumbing Heating and Air right away to have it inspected and repaired safely.

It is common to notice a slight burning smell the first time you turn on your furnace for the season. This odor is usually caused by dust and debris that has settled on the furnace’s heat exchanger and burners over the summer months. When the furnace fires up, this dust is simply burned off. This smell is typically harmless and should dissipate within an hour or so of the furnace running. If the smell is faint and goes away quickly, it is generally not a cause for concern.

However, if you notice a strong, persistent burning smell, it could indicate a more serious problem. An overheating blower motor can produce a metallic or electrical burning odor. This can happen if the motor is failing or if airflow is severely restricted by a clogged air filter, forcing the motor to work too hard. If you notice this type of smell, you should change your air filter immediately. If the smell persists, turn off the furnace and call for service, as an overheating motor can be a fire hazard.

A burning smell could also be caused by an electrical issue within the furnace, such as frayed wiring or a failing component on the control board. These situations can be very dangerous and require immediate professional attention. If you smell anything that resembles burning plastic or melting wires, shut off the power to your furnace at the circuit breaker and call Zuzu’s emergency service line right away. Do not take any chances with electrical odors from your heating system.

The cost of a furnace repair is highly dependent on the specific part that has failed and the labor required to fix it. Minor repairs are typically quite affordable. This includes services like cleaning a dirty flame sensor, replacing a single furnace filter, or adjusting a pilot light. These are quick fixes that do not involve expensive parts. The total cost for these types of repairs will usually consist of our standard diagnostic fee and a minimal labor charge. We always provide upfront pricing for any repair.

Mid range repairs involve the replacement of more significant components. Common examples include replacing a hot surface ignitor, a gas valve, a run capacitor, or a thermostat. The parts for these repairs are more expensive than minor components, and the labor is more involved. The total cost will reflect the price of the specific part and the time it takes our technician to install it correctly and safely. Our flat rate pricing means you will know the full cost before we start the work.

Major furnace repairs are the most expensive and typically involve replacing the blower motor or the main control board. These are two of the most critical and costly components in your furnace. In some very serious cases, a furnace may be diagnosed with a cracked heat exchanger. Due to the extreme safety risk of carbon monoxide poisoning, a cracked heat exchanger is a problem that almost always necessitates a full furnace replacement rather than a repair. Our technicians will always provide a clear and honest assessment of your options.

When it comes to furnace repair, especially gas furnaces, it is strongly recommended to leave the work to trained and licensed professionals. While a homeowner can and should handle simple maintenance tasks like changing the air filter, most repairs involve components that can be dangerous if handled improperly. Gas furnaces involve two major hazards: natural gas and high voltage electricity. Attempting to repair these systems without the proper knowledge, tools, and safety training can have severe and even fatal consequences.

Working with natural gas lines is extremely risky. An improper connection can lead to a gas leak, which creates a significant risk of a fire or explosion in your home. Carbon monoxide is another deadly risk. If a repair disturbs the furnace’s combustion or venting, it could cause carbon monoxide to leak into your home. Technicians are trained to use specialized equipment to test for both gas leaks and carbon monoxide to ensure the system is operating safely after a repair.

The electrical components in a furnace also pose a serious risk of electric shock. Furthermore, a DIY repair can often lead to more damage. Misdiagnosing the problem or installing the wrong part can create a chain reaction of failures, turning a simple repair into a much more complex and expensive one. You may also void your furnace’s warranty by performing unauthorized work. For the safety of your family and the protection of your home, always call a professional like Zuzu for furnace repairs.

A cracked heat exchanger is one of the most serious problems a furnace can have, but it can be difficult for a homeowner to detect. There are no definitive signs that are always present, but there are some potential clues to watch for. One symptom can be a change in the appearance of the burner flame. The flame should be steady and blue. If the flame is yellow, flickering, or appears to be dancing or blowing around, it could be caused by air being drawn through a crack in the heat exchanger.

You may also notice other physical signs around the furnace. Soot or black carbon buildup on the inside of the furnace is a strong indicator that the combustion process is not happening correctly, which can be a result of a cracked heat exchanger. You might also see signs of moisture or condensation on the inside of the furnace or on your windows, as a crack can allow water vapor, a byproduct of combustion, to enter your airstream. An unusual, unpleasant odor that is not a burning smell could also be a clue.

However, the most critical warning sign is your carbon monoxide (CO) detector going off. A cracked heat exchanger is a primary cause of CO leaks from a furnace. If your CO detector ever alarms, you must treat it as a life threatening emergency. Evacuate your home immediately and call 911. Because the signs can be subtle, the only way to be certain about the condition of your heat exchanger is to have it professionally inspected. Our technicians can use a special camera to visually inspect the heat exchanger for cracks.

At Zuzu Plumbing Heating and Air, we treat a no heat situation in the winter as a top priority emergency. We understand how critical it is to restore heat to your home for your family’s safety and comfort. That is why our emergency furnace repair service is available 24 hours a day, 7 days a week. When you call us with a no heat emergency, your call is immediately flagged as urgent. Our customer service team will dispatch the next available technician to your home as quickly as possible.

We maintain a team of on call technicians around the clock, strategically positioned to serve our entire Modesto and Stanislaus County service area. This allows us to offer rapid response times, even in the middle of the night or on a holiday. We know that when your furnace fails, every hour matters. Our goal is to arrive at your home promptly, equipped with the tools and parts needed to diagnose and repair the problem efficiently.

Our service vehicles are stocked like mobile warehouses, carrying a wide range of the most common furnace repair parts. This high level of preparation means that in the vast majority of cases, we can complete the repair and restore your heat in a single visit, without having to leave to find a part. Our commitment is to provide the fastest, safest, and most effective emergency furnace repair service possible to get your home warm again.

Get The Best Furnace Repair Near You

If your furnace has left you in the cold, don’t wait. Call Zuzu Plumbing Heating and Air for fast, safe, and reliable furnace repair in the Modesto area, available 24/7.

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Schedule now (209) 477-9722