Daikin Mini-Split Heat Pump Troubleshooting Guide

daikin mini split

Heat pumps have revolutionized the way we heat and cool our homes, and Daikin stands at the forefront of this innovation with its reliable systems. As a global leader in the HVAC industry, Daikin’s mini-split heat pumps are celebrated for their energy efficiency and reliability. However, even the most advanced systems can run into issues. In this guide, we offer troubleshooting steps you can try before calling the experts.

What To Do If Your Daikin Mini-Split…

Doesn’t Heat/Cool Sufficiently

  1. Look at the thermostat. Begin troubleshooting by double-checking your thermostat settings. Confirm that it’s accurately programmed to your preferred temperature and set to the appropriate mode (heat or cool). Don’t forget to inspect the thermostat’s battery – if it’s running low, swap it out for a fresh one.
  2. Check the filter. Clogged filters can impede airflow, leading to a dip in efficiency. Make it a habit to clean or replace these filters every 1-3 months, ensuring your heat pump performs at its peak.
  3. Inspect the outdoor unit. Take a look at your heat pump’s outdoor unit. Ensure it’s free from any obstructions like debris, overgrown vegetation, ice or snow. Unobstructed airflow around the unit is vital for optimal heat pump functionality.

Doesn’t Turn On

  1. Confirm the heat pump is receiving power. Start with a power supply check. Ensure your heat pump is getting the power it needs by inspecting the circuit breaker or fuse. Confirm that neither is tripped, and double-check that the remote controller for the indoor unit is comfortably settled in the “On” position.
  2. Check the remote control. If your heat pump uses a hand-held remote, check the batteries to make sure they’re not dead. Confirm that the remote is communicating with the heat pump.
  3. Consider the defrost cycle. When the cold weather hits, heat pumps sometimes need to go through a defrost cycle. This temporary interruption helps melt away ice on the outdoor unit. Keep an eye out for this as it could be the cause of your problem.

Makes Strange Sounds 


  1. Turn it off and call your HVAC company. If your Daikin mini-split is grinding or squealing, it might indicate trouble with the blower motor or fan. Power off the heat pump immediately. Connect with us for a timely tune-up. Quick action can pinpoint and fix the issue.

Rattling or Vibrating

  1. Give your heat pump a stability check. Do this by ensuring all screws and bolts are snug and tightly secured. Loose components can cause your system to rock and vibrate. If the wobbles persist, give Team Harding a call for an inspection and service.

Contact Team Harding for Expert Assistance on Your Daikin Mini-Split

If you encounter a challenge that you can’t quite solve, our team of seasoned experts is just a call away. As Ottawa’s trusted HVAC company and a proud Daikin dealer, we have the expertise to swiftly and professionally diagnose and repair your mini-split, no matter the problem. 

We’re here to keep your mini-split running seamlessly.

Contact us to arrange service.

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Team Harding has been Ottawa’s leading home comfort specialist since 1994. We are a family-owned and operated local business and all of our installers and technicians are fully licensed.

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