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How to Fix Your Furnaces Short Cycling Problem and Save Money

How to Fix Your Furnace’s Short Cycling Problem and Save Money

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How to Fix Your Furnace's Short Cycling Problem and Save Money

Does your furnace run for a few minutes, then shut off for a few minutes, only to start again? Is this starting to make your energy bill skyrocket? If so, then you may be experiencing a potentially dangerous condition known as short cycling. In this long and comprehensive article, we will dive deep into the furnace short cycling problem and cover the causes, consequences and methods to use in order to fix it.

Having a working knowledge on how to identify, troubleshoot and fix short cycling can help you keep your home safe and save you money on your utility bills.

What is Furnace Short Cycling?

Furnace short cycling is a term describing when a furnace repeatedly cycles on and off in quick succession in order to regulate the temperature in a home or office. This rapid firing can hamper the efficiency of the entire system, leading to a spike in energy costs and a lack of comfort in a home.

Furnaces are designed to be comfortable and efficient. When there is an issue like short cycling, it can create an environment that is neither comfortable nor energy efficient. Short cycling occurs when a furnace always starts again, even when it hasn’t cooled down enough. This inefficiency can significantly increase energy costs.

Causes of Furnace Short Cycling

The most common cause of furnace short cycling is an insufficient amount of fuel being supplied to the unit. In many cases, this is due to an excessively sized furnace being installed, which leads to the demand for fuel being too high for the supply to match.

Other causes of short cycling include an oversized or clogged air filter, blocked air intakes, blocked or faulty flue, damaged heat exchanger, incorrect thermostat settings, or broken components such as fan motors and relays.

What are the Consequences of Furnace Short Cycling?

Short cycling can cause a variety of problems including dangerously high levels of carbon monoxide, unnecessarily high energy bills, fires, and safety hazards. In order to ensure the safety of your home and family, it is important to identify and fix furnace short cycling as soon as possible.

How to Fix Your Furnace's Short Cycling Problem

Take Care of Obvious Issues:

It’s important to inspect the furnace’s air intake and exhaust vents prior to performing any work. Air obstructions and clogged parts can cause furnace short cycling, so it’s important to check for any signs of debris, dirt, or obstructions.

Evaluate the Size of Your Furnace:

If your furnace is too large for the space it’s heating, it can lead to short cycling. An HVAC contractor can help you determine the size best suited for your space and install it if necessary.

Inspect the Heat Exchanger:

A damaged heat exchanger can cause short cycling, and it must be replaced immediately. A professional should be able to identify this issue and provide a replacement.

Check the Thermostat:

Thermostats often contain sensors that measure the temperature of a room or area. If these sensors are not properly calibrated, they can cause the furnace to shut off too early, leading to short cycling.

The thermostat’s software can sometimes be tweaked to correct any issues that may be causing the issue. If that doesn’t work, it may be time to invest in a new one.

Inspect Fan Motors and Relays:

Another potential cause of short cycling is a broken or malfunctioning fan motor or relay. These parts should be inspected regularly in order to prevent any issues.

If the fan motor or relay appears to be faulty, it should be serviced or replaced as soon as possible. A professional HVAC technician can help you diagnose these problems and provide the necessary repairs.


Furnace short cycling can be an expensive and dangerous issue. It is important to be aware of the causes and consequences of the issue in order to keep your home safe and your energy bills low. If you believe you are experiencing furnace short cycling, then it is important to contact a professional HVAC contractor as soon as possible to inspect your unit.

If you wish to read more information about Furnace Short Cycling, click here. You can also get advice to call Local Reliable Appliance Repair at (866) 516-1222 for help.

How to Fix Your Furnace's Short Cycling Problem and Save Money
How to Fix Your Furnace's Short Cycling Problem and Save Money
How to Fix Your Furnace's Short Cycling Problem and Save Money

Furnace Short Cycling

Preventive action to avoid Furnace Short Cycling can help maintain adequate temperatures in your home and make sure your furnace is working safely and efficiently. Following manufacturer recommendations and local appliance or HVAC technician’s recommendations is the best way to make sure your furnace does not suffer from short cycling issues.

PLEASE consider the following tips when it comes to preventive action against Furnace Short Cycling:

  • Check and clean your filter – Dust, pet hair and dirt build up can restrict air flow, causing your system to overheat. Clean your filter every couple of months and/or check it often to make sure it is not clogged.

  • Replace a dirty flame sensor – Just like the air filter, a dirty flame sensor can also cause a furnace to short cycle. Make sure to regularly clean the flame sensor and understand how to test if it is working properly.

  • Inspect the blower for clogs – Debris can build up in the blower and cause it to overheat and result in short cycling. It is important to regularly clean the blower motor to make sure it is working properly.

  • Monitor the air flow of the system – The air flow of your system is important to make sure it operates efficiently. If the air flow is blocked or restricted in any way, it can cause the system to short cycle. Make sure to adjust the air flow accordingly when necessary.

  • Check the thermostat – If the thermostat is not set properly it can cause your system to overheat and short cycle. Make sure to periodically check the thermostat and make sure it is set properly for optimal performance.

  • Schedule professional maintenance – Schedule preventive maintenance with a professional HVAC technician to make sure your system is operating properly and identify any potential problems before they become an issue.

Following these tips and working with a professional HVAC technician to inspect your system regularly can help prevent any Furnace Short Cycling issues and maintain a safe and efficient system.

Furnace Short Cycling Repair Cost Guide in San Diego

Overviewing the repair costs to resolve furnace short cycling in San Diego can be difficult. The cost of repairs or installation can range from the minimum cost of parts and labor to a complex set up to be implemented by a local specialist. We suggest calling Local Reliable Appliance Repair at tel:(866) 516-1222 for detailed advice.

The minimum costs to repair furnace short cycling issue in San Diego can be range from $250 to $650, depending on the complexity and spare parts needed for the job. The most commonly replaced parts include:

  • Thermal Coupling – $200
  • Home Appliance Capacitor – $35
  • Air Filter – $20
  • Blower Motor – $220
  • Control Board – $160

The labor cost involved to install the above mentioned parts can range from $90 to $150. The cost of materials such as wiring and insulation should be discussed with the technician prior to starting the job. Based on the complexity of the repair, the costs can increase to up to $1,000 or more. We recommend Local Reliable Appliance Repair's technicians for any heating or air conditioning installation or repair cost in San Diego.

Exploring Solutions to Furnace Short Cycling

Furnace short cycling is a recurring and often difficult problem to address. It can cause damaging effects to a home and the occupants, draining energy and increasing utility costs. Homeowners should consider seeking professional help to address this issue.

Reliable HVAC and Appliance Repair is a local appliance and heating/air conditioning repair company based in San Diego. This family-owned business offers same-day repair and installation services. As a first-time customer, you can enjoy a $25 reduction on labor costs.

The trained staff of Reliable has more than five years of experience in the field, so you can rest assured that you are getting quality work. Furthermore, their pricing is fair and the company is fully licensed and insured.

Reliable can address the issue of Furnace Short Cycling quickly and effectively. With prompt same-day repairs and competitive pricing, they can help protect your home and restore its heating efficiency.

Eliminate Furnace Short Cycling once and for all by contacting Reliable HVAC and Appliance Repair today. For first-time customers, they offer a $25 reduction on labor costs. Call them at tel:(866) 516-1222 or visit their website for more information.

FAQ: How to Fix Your Furnace's Short Cycling Problem and Save Money

What is furnace short cycling?
Furnace short cycling is when the furnace turns on for a short amount of time and then turns back off, repeating the short cycle over and over. This can happen either with a gas, electric, or oil-fired furnace.

What causes furnace short cycling?
The most common cause of furnace short cycling is an overheating or clogged air filter. Other potential causes could be a blocked or disconnected vent or flue, an undersized furnace, or a clogged burner.

What are the effects of furnace short cycling?
The effects of furnace short cycling can be expensive and dangerous. Not only does it reduce the life span of your furnace and wastes energy, but if the furnace is heating and cooling your home too quickly, it can be a safety hazard.

What can I do to fix my furnace's short cycling issue?
If you have an issue with your furnace short cycling, first replace or clean the air filter. If that doesn't fix the problem, contact a professional HVAC technician to inspect and repair your furnace and vents.

How can I prevent future furnace short cycling issues?
The best way to prevent future furnace short cycling is to frequently check and clean your furnace filters. Additionally, a certified HVAC technician should inspect your furnace regularly.

If you have further questions or issues, please contact Local Reliable Appliance Repair at (866) 516-1222.