Heat Pump Blowing Cold Air on Heat Mode: 7 Causes, Ranked
Start with the two possibilities that are completely normal, then work through the five that are not. Most cases resolve without a service call.
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Troubleshooting
Error codes, strange noises and what you can safely fix yourself.
Mitsubishi Mini Split Error Codes: How to Read Them and What to Check
Mitsubishi reports faults as two-character codes and as LED blink patterns. Here is how to retrieve a code and what the major families of codes point to.
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Heat Pump Frozen Outside: When It’s Normal and When It Isn’t
A light coating of frost in winter is expected. A block of ice encasing the coil or ice on the top of the unit is a problem you should not ignore.
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