A ductless mini-split heat pump that successfully cools your home during summer but fails to provide warm air during winter can be affected by several mechanical, operational, or control issues. First, check your remote control or thermostat settings to ensure the system is switched explicitly to the "Heat" mode rather than "Cool" or "Dry" settings. Second, check if the outdoor unit is locked in an extended defrost cycle to melt heavy frost accumulation on its outdoor coil during freezing weather. Third, a malfunctioning reversing valve—which redirects refrigerant flow to change modes—or low refrigerant levels can cripple heating capacity. You can troubleshoot error codes on the indoor display panel. You can verify that the system is functioning properly when resetting settings or servicing the reversing valve restores warm air delivery.
1 votes
Marked as accepted