Defrost/Control Board cost in Phoenix
A fair price for defrost/control board in Phoenix is $375–$625 as of July 2026. That range covers the diagnostic visit, the part, licensed labor, and a written warranty — not parts alone. Typical is about $500.
| Line | Typical range |
|---|---|
| Part (typical wholesale) | $140–$300 |
| Labor & diagnostic | $170–$300 |
| Fair total, installed | $375–$625 |
What it does
The control board is the system's logic — it sequences the compressor, fan, and on heat pumps the defrost cycle. A failed board can leave the unit dead or stuck.
Why it fails in Phoenix
Power surges during monsoon season are a common cause here. Ask about a surge protector when the board is replaced, and ask for the board part number on the quote.
What a fair quote includes
- Diagnostic and testing
- The part, new — ask for the part number
- Labor by a licensed tech
- Parts and labor warranty in writing
Worth knowing
- Power surges during monsoon season are a common cause — ask about a surge protector.
- A fair quote names the board part number.
Have a quote for this repair? See where it falls.
Questions
What should the quote include?
A fair quote covers the diagnostic visit, the part, licensed labor, and a written parts-and-labor warranty. Ask for the part number — with it, the price is checkable.
Why do quotes for this vary so much?
Brand of part, warranty length, after-hours timing, and how hard your system is to access all legitimately move the number. That is why we show a range rather than a single price.
Is the diagnostic fee extra?
It varies. A fair quote credits the diagnostic fee toward the repair if you approve the work — ask before the tech starts.
Ranges updated July 21, 2026. Estimates are planning ranges based on regional market data, not binding quotes. Final pricing depends on your specific system and an on-site diagnosis. How we set these ranges