A malfunctioning furnace can make Sacramento’s cold mornings feel even colder.
Cronus Service provides fast and reliable furnace repair, covering ignition issues, heating inconsistencies, airflow problems, electrical faults, and safety concerns. Our licensed HVAC technicians diagnose furnace problems accurately and restore heat the same day in the most cases.
What We Offer and Deliver
Complete diagnostic of ignition, airflow, safety controls, and furnace electronics
Burner inspection, flame sensor cleaning, and ignition system evaluation
Blower motor, capacitor, relay, and control board testing
Heat exchanger inspection for cracks, overheating, or safety risks
Thermostat communication, calibration, and cycle testing
Full performance verification and safety check after repairs
Stages
Browse by category and find the service you need:
Stage 1
We assess ignition components, sensors, burners, blowers, airflow, and electrical systems to identify the root cause.
Book request
Stage 2
Our technician evaluates motors, pressure switches, relays, limit switches, capacitors, and safety circuits.
Stage 3
Faulty ignitors, flame sensors, motors, or controls can usually be repaired or replaced during the same visit.
Stage 4
We ensure proper ignition sequence, airflow balance, and heating output for safe and efficient operation.
Stage 5
We walk you through the repair and suggest maintenance or upgrades to prevent future issues.
Tip
Repair is often the most cost-effective decision when experiencing:
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Caused by ignition problems, blower issues, or dirty components — all typically repairable.
Rattling, grinding, or burning smells can indicate mechanical wear or airflow blockages.
Often linked to overheating, sensor problems, or airflow restrictions.
A furnace struggling to maintain heat consumes more energy and may need repair to restore efficiency.
Pro Tip:
Replacing an older furnace often saves money long-term by improving efficiency and reducing yearly repair costs.
Furnace Repair Service Description
Furnaces are essential for maintaining comfort during Sacramento’s chilly winter nights and early mornings. Over time, heating components wear out, ignition parts weaken, and airflow becomes restricted — reducing comfort and raising energy bills. Timely furnace repair restores efficiency and prevents sudden system failures.
Early signs of furnace trouble include uneven temperatures, longer run times, reduced airflow, or weak heating output. These issues are typically linked to dirty burners, failing motors, clogged filters, or ignition problems.
Strange noises such as banging, squealing, or humming often indicate internal mechanical wear. Electrical burning smells or metallic odors should always be evaluated immediately for safety.
Short cycling — when the furnace turns on and off quickly — is often caused by overheating, thermostat issues, or airflow restrictions. A professional diagnostic identifies the cause and prevents long-term damage.
• Weak ignition or delayed burner startup
• Faulty flame sensors and dirty burners
• Short cycling and overheating
• Blower motor failures
• Worn capacitors and relays
• Heat exchanger issues
• Thermostat communication problems
• Airflow restrictions and dirty filters
• Electrical or control board failures
• Excessive noise or vibration
Sacramento’s winters may be mild, but temperatures still drop into the 30s. A failing furnace can quickly lead to discomfort and higher energy use. Addressing furnace issues early prevents costly repairs and ensures your system can keep up with peak heating demand.
Furnaces are also safety-critical appliances. Ignition problems, overheating, or cracked heat exchangers should never be ignored.
Repair is usually recommended when:
• The furnace is under 10–12 years old
• The issue involves minor components
• The system has been well-maintained
• Repair costs are low compared to replacement
Replacement is better when:
• The furnace is 12–20+ years old
• Repairs exceed 25–30% of replacement cost
• Energy bills have increased sharply
• Safety issues exist (heat exchanger concerns)
• The furnace struggles to maintain temperature
Cronus Service technicians use advanced diagnostic tools, manufacturer-approved components, and precise repair methods to restore furnace performance. We emphasize safety, accuracy, and clear communication throughout the repair process. Most repairs are completed same-day thanks to stocked service vehicles.
A furnace that works properly keeps your home warm, efficient, and safe. Whether your system is blowing cool air, making strange noises, or failing to ignite, Cronus Service is ready to diagnose and repair the problem quickly. We keep Sacramento homes comfortable all winter long.
Serving Sacramento, Roseville, Rocklin, Lincoln, Granite Bay, Folsom, El Dorado Hills, Elk Grove, and nearby areas.
Consultation
Send us a quick request — we’ll get back to you within 15 minutes.
You’ll receive a detailed cost estimate
We’ll help you choose the right equipment
We’ll answer all your questions
(!) No pressure. No hidden conditions. Just clear, professional service.
Top rated
Certified and recognized as a leader in quality and reliability.
Gallery
Real installations. Real homes. Real results
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Reviews
I requested quotes from five AC companies and most of them were overpriced- the highest was over $25k. There were others that were less. Cronus service came out the lowest, so I went with them. Sergei, Dennis, and Alex were very professional. They actually shook my hand and introduced themselves. It was a two day install, temps were hot but they kept on working and didn't stop until the install was completed. At the end of the day this company and the workers at top notch. You can trust them, no gimmicks or stings attached.
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Highly recommend Cronus Service! AC unit was not working and was able to get a serviceman from Cronus Service for a same day FREE diagnostic. Other repair companies charged upwards of $200 just for the service. Upon arrival (communication was very clear and crisp), Alex took a look at our system and diagnosed the issue right away. He took time to explain everything that was happening and what his recommended fixes were. The quoted cost was very fair and he had the parts ready in his truck to fix right away. Even included a free tune up!
Denys added extended ductwork to a room that didn't have central unit hooked up! But now it's up and running!! Awesome job for only one man to do the project!!! Hopefully will last awhile! No more TOO HOT or TOO COLD in the room! JUST RIGHT!!!DENYS IS DA MAN!!!Thanks Denys!!!
I requested quotes from five AC companies and most of them were overpriced- the highest was over $25k. There were others that were less. Cronus service came out the lowest, so I went with them. Sergei, Dennis, and Alex were very professional. They actually shook my hand and introduced themselves. It was a two day install, temps were hot but they kept on working and didn't stop until the install was completed. At the end of the day this company and the workers at top notch. You can trust them, no gimmicks or stings attached.
I requested quotes from five AC companies and most of them were overpriced- the highest was over $25k. There were others that were less. Cronus service came out the lowest, so I went with them. Sergei, Dennis, and Alex were very professional. They actually shook my hand and introduced themselves. It was a two day install, temps were hot but they kept on working and didn't stop until the install was completed. At the end of the day this company and the workers at top notch. You can trust them, no gimmicks or stings attached.
I requested quotes from five AC companies and most of them were overpriced- the highest was over $25k. There were others that were less. Cronus service came out the lowest, so I went with them. Sergei, Dennis, and Alex were very professional. They actually shook my hand and introduced themselves. It was a two day install, temps were hot but they kept on working and didn't stop until the install was completed. At the end of the day this company and the workers at top notch. You can trust them, no gimmicks or stings attached.
I requested quotes from five AC companies and most of them were overpriced- the highest was over $25k. There were others that were less. Cronus service came out the lowest, so I went with them. Sergei, Dennis, and Alex were very professional. They actually shook my hand and introduced themselves. It was a two day install, temps were hot but they kept on working and didn't stop until the install was completed. At the end of the day this company and the workers at top notch. You can trust them, no gimmicks or stings attached.
I requested quotes from five AC companies and most of them were overpriced- the highest was over $25k. There were others that were less. Cronus service came out the lowest, so I went with them. Sergei, Dennis, and Alex were very professional. They actually shook my hand and introduced themselves. It was a two day install, temps were hot but they kept on working and didn't stop until the install was completed. At the end of the day this company and the workers at top notch. You can trust them, no gimmicks or stings attached.
I requested quotes from five AC companies and most of them were overpriced- the highest was over $25k. There were others that were less. Cronus service came out the lowest, so I went with them. Sergei, Dennis, and Alex were very professional. They actually shook my hand and introduced themselves. It was a two day install, temps were hot but they kept on working and didn't stop until the install was completed. At the end of the day this company and the workers at top notch. You can trust them, no gimmicks or stings attached.
I requested quotes from five AC companies and most of them were overpriced- the highest was over $25k. There were others that were less. Cronus service came out the lowest, so I went with them. Sergei, Dennis, and Alex were very professional. They actually shook my hand and introduced themselves. It was a two day install, temps were hot but they kept on working and didn't stop until the install was completed. At the end of the day this company and the workers at top notch. You can trust them, no gimmicks or stings attached.
FAQ
Your furnace may blow cold air if the ignition system fails, if the flame sensor is dirty, or if the burner assembly cannot maintain combustion. Another common cause is overheating — when the system gets too hot, the safety switch shuts off the burners but keeps the blower running, resulting in cold airflow. Clogged filters, dirty coils, or airflow restrictions often trigger these shutdowns. A professional diagnostic quickly identifies the root cause and restores proper heating.
Yes — we prioritize “no heat” situations, especially for families with children, seniors, or pets. Furnace failures often occur at night or early in the morning, so our team is prepared to respond quickly. Many emergency repairs can be completed on the spot thanks to our stocked service vehicles. When needed, we also provide temporary heating solutions until a full repair is completed.
Yes, we can repair most older furnaces as long as replacement parts are still available and the system does not pose a safety risk. Many older units only need ignition components, motors, or electrical controls replaced to continue operating safely. However, if your furnace uses discontinued parts or suffers from declining efficiency, we may recommend upgrading. Our technicians will explain your options clearly so you can make an informed decision.
Yes — all furnace repairs performed by Cronus Service come with a 1-year parts and labor warranty as required by California law. This means if the same component fails again within the warranty period, we will repair it at no additional cost. We also offer extended warranty options for customers with older systems or high-usage furnaces. Our goal is to ensure long-term reliability and peace of mind.
We offer same-day service for most furnace repairs, especially during cold weather when heating is essential. Our technicians carry common parts such as ignitors, sensors, capacitors, and motors, allowing us to complete repairs during the initial visit. In most cases, we can schedule your appointment within a few hours. We also provide a courtesy call before arrival so you know exactly when to expect us.
Short cycling usually happens when the furnace overheats, the thermostat malfunctions, or sensors detect unsafe operating conditions. Dirty filters, restricted airflow, or poor ventilation often cause overheating, while electrical issues may trigger frequent stopping and starting. If left unaddressed, short cycling increases wear on motors and reduces system lifespan. A technician will inspect all major components to identify the cause and restore safe, consistent operation.
Contact US
Licensed, insured, and fully certified
We work with equipment from all major brands
In-house team — no subcontractors, no middlemen
Transparent estimates and fixed pricing before work begins
Keeping the best prices in the area, apply rebates
Ongoing service, repairs, and support after installation
Consultation
Send us a quick request — we’ll get back to you within 15 minutes.
You’ll receive a detailed cost estimate
We’ll help you choose the right equipment
We’ll answer all your questions
(!) No pressure. No hidden conditions. Just clear, professional service.
Your Local Experts in HVAC, Electrical, Solar, Plumbing and Construction. Serving Homes and Businesses Across Sacramento, Yolo, El Dorado & Placer County
Cronus Service Inc. © 2025
Our manager will contact you to advise you and answer all your questions.
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