Heat Pumps & Mini-Splits
What Is Reversing Valve?
Definition
The reversing valve is the component that lets a heat pump switch between heating and cooling mode — it physically redirects the flow of refrigerant so the same outdoor and indoor coils can either absorb heat from outside (winter) or reject heat outside (summer). It's a part standard air conditioners simply don't have.
Why it matters for your home
A stuck reversing valve is a common reason a heat pump gets "stuck" blowing cool air when it should be heating, or vice versa — it's a specific, diagnosable failure, not a sign the whole system needs replacing.
What to do about it
If your heat pump is blowing the wrong temperature air for the season, mention that specifically when booking service — it points a technician straight at likely causes like the reversing valve.
Related terms
This definition is pending licensed-trade technical review. It's sourced from our own published service and guide content, not invented — but hasn't yet been signed off by a licensed HVAC reviewer.
Back to the full glossaryOne call does it
Heard this term in a quote?
Bring it to Best Owner Direct for an honest, no-obligation second look — we'll translate every line item, no pressure.
Locally operated · Licensed CCB# 199049 · 1-Year Workmanship Warranty