2020 Hyundai Santa Fe: Rear A/C doesn't cool after being adjusted
Common wear/failure (not a recall)
Symptoms
Owners of the 2020 Santa Fe report: rear A/C doesn't cool after being adjusted. CarComplaints.com lists 1 owner complaints, average mileage 2,500 miles.
NHTSA has 5 owner complaints for the 2020 Santa Fe in this area. Examples:
- NHTSA complaint ODI #11766135 (filed 09/22/2026): “At approximately 42,000 miles, the ac system on my 2020 hyundai santa fe suffered a potential immediate and premature failure, creating a severe driving safety hazard. the ac expansion valve began actively leaking refrigerant inside the dashboard, rendering th…”
- NHTSA complaint ODI #11697132 (filed 11/03/2025): “2020 sante fe with 59000 miles on it. air stops blowing cold, i look it up and there is a tsb for the evaporator temperature sensor from may of 2021. this is a safety issue because if you run the air conditioning or defroster if the sensor is bad it clicks off…”
Likely causes
Sources do not establish a single root cause; diagnosis is needed. Owner-reported fixes are listed below.
Fix, in plain English
Most common owner-reported solutions on CarComplaints.com: none clearly reported. Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Opening the A/C system requires refrigerant recovery equipment, and US EPA Section 609 certification is required to service vehicle A/C for compensation. (Our assessment.)
Cost
No sourced cost range: get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
- CarComplaints.com: Rear A/C doesn't cool after being adjusted (2020 Santa Fe)
- NHTSA complaints API, 2020 Santa Fe
Page last updated .