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Service bulletins for the 2020 Ram 1500

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1228 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Only bulletins with component: Heating and air conditioning are shown. Show all

Bulletins, newest first
91001142023-05-30. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:AIR HANDLER/CHAMBER, DUCTS, AND VALVES; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Duct Assy Charge Air Cooler In If the seal is missing from inside a Henn connector, please search for the missing seal. It could have been pulled out while removal of the hose from the spigot if it was partially stuck to the spigot. It could have been blown into the hose or CAC. If that is the only concern with the CAC Hose Assembly, then replace the seal with a new replacement seal instead of replacing the entire hose assembly.
S23230000042023-02-13. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Defogger Is Not Working. Terminal Detached From The Glass.
S22230000632023-01-09. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Ambient Temperature Sensor Servicing.
S2224000001RevA2023-01-09. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Customer indicates AC does not blow cool air. Possible DTC B11FE-11 or B11FE-15 Variable Compressor Control Circuits.
S22230000632022-11-07. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM. Ambient Temperature Sensor Servicing.
S2224000001RevA2022-10-31. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Customer indicates AC does not blow cool air. Possible DTC B11FE-11 or B11FE-15 Variable Compressor Control Circuits.
S2224000001RevA2022-10-31. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Customer indicates AC does not blow cool air. Possible DTC B11FE-11 or B11FE-15 Variable Compressor Control Circuits.
S20240000032022-09-26. Service bulletin. STRUCTURE; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Customer Indicates A Whistle Noise From Dash During Certain Driving Parameters.
90042892022-09-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. COMPRESSOR, Air Conditioning, Complete Diagnosing the vehicle for poor A/C performance call: FCA Redacted Content before changing the compressor. If no response in 15 minutes, proceed with repair.
S21240000032022-09-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. A/C Performance Not As Hot/Cold On Driver Side - DTC's B11CB-92, B11CB-11
S19240000192022-09-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Customer Indicates That Temperature Varies From Side To Side Being Colder On One Side Compared To The Other.
S1924000019RevB2022-09-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Customer Indicates That Temperature Varies From Side To Side Being Colder On One Side Compared To The Other.
S21240000042022-09-26. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. A/C does not cool and vehicle is low on Freon charge but no leak is found with sniffer or black light anywhere in the system
S1924000019 Rev.2021-03-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:PRESSURE/TEMPERATURE SENSOR; EQUIPMENT:APPLIANCE:AIR CONDITIONER. Customer Indicates That Temperature Varies From Side To Side Being Colder On One Side Compared To The Other.
S2024000003 Rev.2021-03-15. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; EQUIPMENT. Customer Indicates A Whistle Noise From Dash During Certain Driving Parameters.
24-001-202020-12-28. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. HVAC Housing Service This bulletin informing the Technician about an HVAC housing redesign with components that need to be serviced together when servicing the HVAC housing. Customers may experience the following: Poor Air conditioning system performance (Slow or excess time to cool down). HVAC is slow to cool, left center instrument panel outlet is warmer than right side instrument panel outlets.
S20080001712020-12-28. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT:APPLIANCE:AIR CONDITIONER. HVAC Blower Motor Operates Intermittently Or Changes Speeds
24-001-202020-12-21. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. HVAC Housing Service This bulletin informing the Technician about an HVAC housing redesign with components that need to be serviced together when servicing the HVAC housing. Customers may experience the following: Poor Air conditioning system performance (Slow or excess time to cool down). HVAC is slow to cool, left center instrument panel outlet is warmer than right side instrument panel outlets.
S20080001712020-12-21. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. HVAC Blower Motor Operates Intermittently Or Changes Speeds
S2024000003 Rev.2020-10-26. Service bulletin. STRUCTURE; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. (Revision B) Customer Indicates A Whistle Noise Is Coming From The Dash During Certain Driving Conditions And HVAC Settings
90042892020-09-28. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT ADAPTIVE/MOBILITY. COMPRESSOR, Air Conditioning, Complete Diagnosing the vehicle for poor A/C performance call: FCA Redacted Content before changing the compressor. If no response in 15 minutes, proceed with repair.
S19080001092020-05-26. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Ambient Air Temperature Displayed Temperature Is Inaccurate
S19080001092020-05-18. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Ambient Air Temperature Displayed Temperature Is Inaccurate
549732019-07-15. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Outlet- Air conditioning & heater

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.