If the air conditioning only blows cold air on the passenger side, it may indicate a problem with the vehicle's climate control system. Possible causes include a malfunctioning blend door actuator, which regulates airflow and temperature, or a refrigerant leak affecting the system's performance. Additionally, issues with the climate control settings or a failing compressor can also lead to uneven cooling. It's advisable to have the system diagnosed by a professional to identify and resolve the issue accurately.
You may have a loose vacuum hose either under your dash, or in the engine compartment.
the blower motor has gone bad
There are a few possible reasonsÊthat an air would only blow cold when accelerating. The top two reasons are that the compressor fan might be malfunctioning or that the compression clutch isn't engaging.
Because you set it that way
The flap is stuck open that controls when and where the heat goes
why does ac blow warm air? why does ac blow warm air?
You need to first check that you do not have any vacuum leaks and then check the a/c / heater door operations, if all are working then its possible that you have a slightly clogged heater core.........
Your heater will blow cold air only.
Bad thermostat
The first thing to have checked is the amount of R134A that the system has and to service it to specifications as the amount is very critical. If that is okay then then system may need to be reprogrammed.
Thermostat and/or heater core may be defective
check your coolant level