Mini-splits are a popular heating choice in Philadelphia homes due to their efficiency and versatility. However, like any heating system, they can sometimes run into issues, such as not heating properly. Here's a step-by-step guide on how to inspect your mini-split when it won't heat, ensuring you can either fix the issue yourself or know when to call in a professional like McCorry Comfort.

Step 1: Check the Power Source

Before diving deeper, ensure that your mini-split is receiving power.

  • Check the circuit breaker and reset if tripped.
  • Ensure the unit is plugged in properly and that no fuses are blown.

Step 2: Inspect the Thermostat

Incorrect thermostat settings can prevent your mini-split from heating.

  • Ensure the thermostat is set to heat mode and that the temperature is set higher than the current room temperature.
  • Check for any error codes displayed on the thermostat, which can indicate specific problems.

Step 3: Clean the Filters

Dirty filters can restrict airflow and impair the heating efficiency of your mini-split.

  • Turn off the unit.
  • Remove and clean the filters with warm water or replace them if they are excessively dirty.

Step 4: Check the Outdoor Unit

Issues with the outdoor unit can affect the heating capability.

  • Inspect for any obstructions like leaves, dirt, or snow that might be blocking the air intake or exhaust.
  • Check for ice buildup around the coils. Defrost if necessary by turning off the unit and allowing the ice to melt.

Step 5: Examine the Air Vents and Coils

Blocked or dirty air vents and coils can significantly reduce heating efficiency.

  • Ensure all air vents are open and unobstructed.
  • Clean the coils using a coil cleaner or mild detergent solution.

Step 6: Listen for Unusual Noises

Unusual noises can be a sign of mechanical issues.

  • Listen for any sounds like grinding or squeaking when the unit is running.
  • Inspect the fan and motor for any visible signs of damage.

Step 7: Professional Assessment

If after all these steps your mini-split still isn’t heating:

  • Consider calling a professional. Some issues, like refrigerant leaks or complex mechanical problems, require professional tools and expertise.

When to Call a Professional

While basic maintenance can be done on your own, certain problems should be addressed by professionals to avoid further damage or inefficiency. If you notice:

  • Persistent error codes
  • Refrigerant leaks (indicated by hissing sounds or ice buildup)
  • Electrical issues beyond a tripped breaker or blown fuse

It’s time to call in experts like McCorry Comfort. They can ensure that your system is running efficiently and safely, keeping your home warm throughout the colder months.

Following these steps will help you determine why your mini-split isn’t heating and guide you on whether you can fix it yourself or need to enlist professional help. Remember, regular maintenance is key to extending the life and efficiency of your heating system.