Reversing Valve

The reversing valve is what allows a heat pump to switch between heating and cooling mode. It redirects the flow of refrigerant so the system can either absorb heat from outside (heating) or dump heat outside (cooling). When a reversing valve fails, your system might blow room-temperature air, get stuck in one mode, or not respond to mode changes on the remote. It's a repair that requires a licensed technician — not something to troubleshoot yourself. If your mini split is cooling fine but won't heat (or vice versa), the reversing valve is one of the first things a tech will check.

Common Questions

What does a reversing valve do?

The reversing valve is what allows a heat pump to switch between heating and cooling mode. It redirects the flow of refrigerant so the system can either absorb heat from outside in winter or dump heat outside in summer, using the same equipment either way.

What are the signs of a failed reversing valve?

When a reversing valve fails, your system might blow room-temperature air, get stuck in one mode, or not respond to mode changes on the remote. Cooling fine but refusing to heat, or the reverse, is the classic version of the problem.

Can a reversing valve be fixed at home?

This one requires a licensed technician — it is not something to troubleshoot yourself. If your mini split heats but will not cool, or the other way around, the reversing valve is one of the first things a tech checks on a repair visit.

Questions about your mini split?

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