On the MHK1 remote, hold both the Fan button and the Up Arrow button for 3 seconds. Then hit More until you set to setting 125. Setting 125: When in Heat mode, once set point has been reached, fan 1) stays on, or 2) turns off. Value: 1 (default) – fan stays ON once set point is reached. 2 – fan turns OFF once set point is reached.
Solution: Most mini-split heat pumps have an indicator that will alert you when aux heat is engaged. If the indicator remains off even in extremely cold weather, you may want to call an HVAC technician. 7. The compressor has failed. The compressor is arguably the most important part of the mini split during heating.
During the colder winter months, reverse cycle air conditioners will, at some point during heating operation, will perform a “defrost” cycle. Defrosting is a normal part of the heating operation and is not a fault with the product.
Check the Thermostat. One of the most common reasons why an air conditioner won’t heat is because the thermostat is set to the wrong setting. If your thermostat is set to “cool,” the air conditioner will only blow cool air. Be sure to check your thermostat and set it to “heat” if you want the air conditioner to generate warmth.
Showing the normal delayed heating function in this Mr Slim Heating and Cooling unit. Nothing to worry, it's just that it takes about 3 minutes for the heat . 9 237 43 258 117 419 80 379

mitsubishi air conditioner heat mode not working