WhatsApp IconChat with Us!
Categories: Blog

How to reset HVAC Blower Sleeper Fuse?

The blower sleeper fuse is a vital component of an HVAC (heating, ventilation, and air conditioning) system. This fuse helps to protect the blower motor from potential damage caused by electrical surges and ensures that the blower won’t start up until it’s heated up sufficiently.

Electricity powers up the fuse and begins heating the component when the thermostat is turned on. The fuse opens and shuts in response to the temperature threshold, allowing current to flow to the blower motor and turning it on. This procedure makes sure that all of the parts are adequately warmed up before being powered on, preventing your HVAC system from being harmed by electrical surges.

This fuse is responsible for protecting your HVAC system from harm and making sure that all of its components are heated to the appropriate temperature before use. It’s a little but important part of maintaining the functionality of your HVAC system.

Need Help ?

Contact Us And Talk With Experts

Contact Us Now!

How Does the Blower Sleeper Fuse Work?

The blower motor of an HVAC machine is safeguarded by the blower sleeper fuse, sometimes known as a mini-fuse. The system monitors the motor’s current, and if that current becomes too high, the fuse trips, turning off power to the motor. This helps guard against potential electrical issues like short circuits or other harm to your heating and cooling system.

The blower sleeper fuse must be manually reset by flipping the switch on it when it trips. After it has been reset, check the motor and wiring to make sure there are no problems before turning your HVAC system back on. This type of fuse shouldn’t be reset more than twice because doing so can point to a more serious problem with your HVAC system that needs to be fixed.

What Are the Signs Of A Failing Blower Sleeper Fuse?

We, at DGB Refrigeration Heating & Cooling, want you to be informed – that’s why we want to tell you about the signs of a failing blower sleeper fuse. It’s key for you to be aware of these signs so that you can act fast and prevent further damage.

Unresponsive When On Low Setting

Let’s say the HVAC unit is set to low but continues running on its highest level – it might be a sign of a faulty blower sleeper fuse. The blower has failed to recognize the lower speed setting, meaning the fuse has either malfunctioned or burnt out.

Need Help ?

Contact Us And Talk With Experts

Contact Us Now!

No Response When Switched Off

Another sign of a failing blower sleeper fuse is when the unit does not respond even after several attempts to switch off and on. The problem here might arise due to a weak connection between the wires or if the fuse itself is burnt out. In these cases, it’s best to call an expert like DGB Refrigeration Heating & Cooling by dialing 03 7038 6918 and have us take a look at your HVAC system and reset the blower sleeper fuse accordingly.

Diminished Air Supply

The on-demand air supply is essential for any HVAC system; however, sometimes due to an overworked blower motor or a faulty fuse, one can experience reduced air supply. This could be attributed to a failing blower motor as well as a blown blower fuse – an expert should immediately check this before it gets out of hand and requires costly repairs.

What Happens When the Blower Sleeper Fuse Breaks?

The blower sleeper fuse may not always be visible when it blows. Although it may appear that your HVAC system is functioning regularly, you won’t be able to draw hot or cold air from it. Even if the blower motor may be operating, the fan won’t be spinning.

Although replacing the fuse isn’t always expensive or difficult, it’s crucial to have a competent technician complete the work properly to ensure that the issue doesn’t return. If the faulty blower sleepers fuse is disregarded, an ineffective HVAC system might result in far higher long-term costs.

The most typical method for resetting a blower sleeper fuse is to disconnect the device’s power supply before replugging it. This will assist in resetting all of the HVAC system’s parts and perhaps resolve any blower sleeper fuse-related problems. If this doesn’t work, you should consult an HVAC professional as soon as possible.

Need Help ?

Contact Us And Talk With Experts

Contact Us Now!

How To Test And Reset the HVAC’s Blower Sleeper Fuse

For safety reasons, it’s crucial to understand how to inspect and reset an HVAC blower sleeper fuse. Although testing and resetting a blower fuse can be a complex task, it can be done safely if the right procedures are followed.

What you must do is as follows:

  1. Start by locating the fuse box, which is typically next to the air handler.
  2. Next, turn off the furnace’s electricity.
  3. It is now time to remove the furnace’s access panel in order to inspect the wiring for any damage or irregularities.
  4. After making sure everything is in order, check the blower sleeper fuse to see if it appears to be broken in any way. If so, a new fuse must be installed right once.
  5. If the fuse shows no signs of damage, you should use a multimeter set at Rx1 or continuity to test its functionality. If resistance is found in both directions, the fuse should be in good condition, and you can move on to resetting the appliance by placing it firmly in its original position in the circuit board of your furnace.
  6. Lastly, re-energize your HVAC system and cross your fingers that everything functions as it should!

Tips to Keep Your HVAC System Working Well

Because it keeps your house comfortable and the air quality good, it’s crucial to keep your HVAC system in good working order. The following advice will help you make the most of your device:

  1. Regularly replace the filters – Depending on your home consumption, the HVAC filter should be replaced every month or two. Your HVAC system’s performance might suffer from a blocked or filthy filter that restricts airflow.
  2. Inspect the blower sleeper fuse. This safety feature trips when the blower motor becomes too hot. By tripping the breaker and restarting your appliance, it is reset. If there are any difficulties with resetting or you want to maintain it operating at its optimum, it is preferable to consult a service specialist.
  3. Clean the air vents – Keeping your home’s air vents clean can assist to minimize dust accumulation in hard-to-reach areas, which can influence indoor air quality and hinder circulation.
  4. Do routine maintenance checks – A qualified specialist can spot any issues before they become serious and make sure that all of the system’s components are operating correctly for optimum performance all year long.

Need Help ?

Contact Us And Talk With Experts

Contact Us Now!


Keeping your HVAC system well-maintained ensures it will last as long as possible and performs at its peak. Keeping up with regular maintenance checks and changing filters as needed prevents small problems from becoming major ones down the road. Having a licensed technician from the DGB Refrigeration Heating & Cooling reset your blower sleeper fuse and test it with a meter will also help to keep it running safely and efficiently. With just a little extra effort and knowledge, your HVAC system will be sure to keep your home comfortable and safe for years to come! Contact us today by dialing 03 7038 6918!


Published by

Recent Posts

HVAC Maintenance Cost

As a homeowner in Upfield, ensuring the optimal performance of your HVAC (Heating, Ventilation, and… Read More

2 months ago

Why Air Conditioner Is Not Cooling? 7 Main issues And Solutions

Is your air conditioner failing to keep your home cool and comfortable, leaving you feeling… Read More

2 months ago

Which Air Conditioner Is Best For Your Home?

When it comes to keeping your home cool and comfortable during the sweltering months of… Read More

2 months ago

Where Should I Place The Return Air Grills?

Return air grills play an important role in the performance of HVAC systems. These grills… Read More

3 months ago

Where should I Install The Thermostat?

The thermostat serves as the control center for your HVAC system, regulating temperature and ensuring… Read More

3 months ago

Where Should I Install Ducts In My Home?

Ducted air conditioning systems are commonly used in almost every other house. There is a… Read More

3 months ago