Honda Odyssey 2018–2019 — technical service bulletin
Bulletin A19-023 · NHTSA communication 10158712 · issued Apr 12, 2019
Technical service bulletin
communication type
Equipment
component
2018–2019
model years
2
vehicle entries
Official summary
Service Bulletin - There is a high-pitched noise coming from the heater case while the fan is on. Some vehicles might have a defective rear blower motor or could have a heater case that was warped during the manufacturing cooling process.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.