Why Is My Mitsubishi Heater Blowing Cold Air? Uncover The 5 Most Likely Causes

Mitsubishi heaters are known for their efficiency and reliability, but even the best heaters can run into problems from time to time. One common issue is that the heater may start blowing cold air instead of warm air. If you’re experiencing this problem, there are a few things you can check to try to troubleshoot and resolve it.

Why Is My Mitsubishi Heater Blowing Cold Air?

There are several possible reasons why your Mitsubishi heater is blowing cold air. Some of the most common causes include:

• Dirty or clogged air filter: A dirty or clogged air filter can restrict airflow and prevent the heater from properly heating the air.
• Frozen evaporator coil: The evaporator coil is responsible for absorbing heat from the air. If the coil is frozen, it will not be able to absorb heat and the heater will blow cold air.
• Faulty thermostat: A faulty thermostat may not be sending the correct signal to the heater, causing it to blow cold air.
• Malfunctioning blower motor: The blower motor is responsible for circulating air through the heater. If the blower motor is malfunctioning, it may not be able to circulate air properly and the heater will blow cold air.
• Low refrigerant levels: Refrigerant is the fluid that absorbs and releases heat in the heater. If the refrigerant levels are low, the heater will not be able to properly heat the air.
• Damaged or leaking ductwork: Damaged or leaking ductwork can allow warm air to escape before it reaches the room, causing the heater to blow cold air.
• Electrical problems: Electrical problems, such as a loose connection or a blown fuse, can prevent the heater from receiving power and blowing warm air.

Troubleshooting a Mitsubishi Heater Blowing Cold Air

If your Mitsubishi heater is blowing cold air, there are a few things you can do to troubleshoot the problem:

• Check the air filter: The air filter should be checked and replaced every month or two, especially during the heating season. A dirty or clogged air filter can restrict airflow and prevent the heater from properly heating the air.
• Inspect the evaporator coil: The evaporator coil is located behind the front panel of the heater. If the coil is frozen, you can try to defrost it by turning the heater off and letting it sit for a few hours. Once the coil is defrosted, you can turn the heater back on and see if it is working properly.
• Check the thermostat: The thermostat should be set to the desired temperature. If the thermostat is not working properly, it may not be sending the correct signal to the heater, causing it to blow cold air.
• Inspect the blower motor: The blower motor is located behind the front panel of the heater. If the blower motor is not working properly, it may not be able to circulate air properly and the heater will blow cold air.
• Check the refrigerant levels: Refrigerant levels can be checked by a qualified HVAC technician. If the refrigerant levels are low, the technician can add more refrigerant to the system.
• Inspect the ductwork: The ductwork should be inspected for any damage or leaks. If there is any damage or leaks, the ductwork should be repaired or replaced.
• Check for electrical problems: Electrical problems can be diagnosed by a qualified HVAC technician. If there are any electrical problems, the technician can repair them and restore power to the heater.

When to Call a Professional

If you have tried the troubleshooting steps above and your Mitsubishi heater is still blowing cold air, it is time to call a professional HVAC technician. A qualified technician can diagnose the problem and repair it quickly and efficiently.

Preventing Cold Air from Blowing from Your Mitsubishi Heater

There are a few things you can do to prevent cold air from blowing from your Mitsubishi heater:

• Change the air filter regularly: The air filter should be changed every month or two, especially during the heating season. A clean air filter will help to improve airflow and prevent the heater from blowing cold air.
• Keep the evaporator coil clean: The evaporator coil should be cleaned every year by a qualified HVAC technician. A clean evaporator coil will help to improve heat transfer and prevent the heater from blowing cold air.
• Have the thermostat checked regularly: The thermostat should be checked every year by a qualified HVAC technician. A properly functioning thermostat will help to ensure that the heater is blowing warm air at the desired temperature.
• Have the ductwork inspected regularly: The ductwork should be inspected every year by a qualified HVAC technician. Proper ductwork will help to ensure that warm air is evenly distributed throughout the house.

Wrapping Up

If your Mitsubishi heater is blowing cold air, there are a few things you can check to try to troubleshoot and resolve the problem. If you have tried the troubleshooting steps above and your heater is still blowing cold air, it is time to call a professional HVAC technician.

What People Want to Know

Q: Why is my Mitsubishi heater blowing cold air even though the filter is clean?

A: There could be several reasons why your Mitsubishi heater is blowing cold air even though the filter is clean. Some possible causes include a frozen evaporator coil, a faulty thermostat, a malfunctioning blower motor, low refrigerant levels, damaged or leaking ductwork, or electrical problems.

Q: What should I do if my Mitsubishi heater is blowing cold air?

A: If your Mitsubishi heater is blowing cold air, you can try the following troubleshooting steps:

• Check the air filter and replace it if it is dirty or clogged.
• Inspect the evaporator coil and defrost it if it is frozen.
• Check the thermostat and make sure it is set to the desired temperature.
• Inspect the blower motor and make sure it is working properly.
• Check the refrigerant levels and have them added if they are low.
• Inspect the ductwork for any damage or leaks and have them repaired or replaced if necessary.
• Check for electrical problems and have them repaired by a qualified HVAC technician.

Q: Can I fix a Mitsubishi heater that is blowing cold air myself?

A: Some problems that cause a Mitsubishi heater to blow cold air can be fixed by the homeowner, such as changing the air filter, defrosting the evaporator coil, or checking the thermostat. However, other problems, such as low refrigerant levels, damaged or leaking ductwork, or electrical problems, should be repaired by a qualified HVAC technician.