How to Clean and Maintain Your Mini Split | Ask This Old House

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In this video, heating and plumbing expert Richard Trethewey explains the maintenance needs of mini-split HVAC units and how a homeowner or professional should deep clean these units to gain the best efficiency. SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldHouse. Mini-splits are a type of air conditioning unit where the two main components are divided into separate parts (an indoor and an outdoor unit), with refrigerant piping connecting them. 77% of the world’s air conditioning market is handled by mini-split. And while they’re simple and efficient, they do require some maintenance. Here’s what you need to know to maintain yours like a professional. Looking for more step by step guidance on how to complete projects around the house? Join This Old House Insider to stream over 1,000 episodes commercial-free: https://bit.ly/2GPiYbH Plus, download our FREE app for full-episode streaming to your connected TV, phone or tablet: https://www.thisoldhouse.com/pages/streaming-app Where to find it? To clean the indoor unit: Start by removing the cover. Most models can be disassembled with a screwdriver [https://homedepot.sjv.io/B0mbNL]. Use a bowl or plastic container [https://homedepot.sjv.io/LX7agY] to collect screws. This will help keep track of all the pieces as you work. With the outer shell off, remove the air filters To clean the air filters: Wash in the sink or spray the air filters using a water hose [https://homedepot.sjv.io/JK4zQN]. If the air filters hav

Published 2025-04-12 · Watch on YouTube ↗
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