A/C stops working after hitting a bump.

Does the vehicle have dual zone climate control, where the driver side and passenger side have different control? Sounds like a blend door issue on the driver side. Why did you replace the passenger side, was it blowing hot too when AC was on?

check for a faulty climate control module.

You have a faulty temperature sensor at the air outlet of the passenger side.

dual climate controls are freon sensitive , be sure
your system is fully charged.

I have a 04 Honda Accor v6 dual climate control when the ac is on the passenger side vents are cold but the driver side is just some what warm air when u put it on low temp

If you have duel climate controll and by this side you mean the drivers side then will tell you that I ended up replacing the controll unit and fixed the problem,When mine would go from cold to hot I would turn off the key then it would go back to normal until I hit a bump or adjusted the heat slider. there are two one on each side of the trans hump.I just went to dealer and asked for a printout of the parts break down.It is way up under there from what I can remember.Well hope this helped a little any way.

check freon level

with a dual climate control system, it is imperative for a proper refrigerant charge to be maintained. the symptom you describe is a possible indicator of low charge on the system. the ac evaporator core is closest to the right side of vehicle thereby making air feel cooler on that side, on the left side of the vehicle the cooled air has farther to travel and warms up from cabin air before it discharged from the vents. this is the most probable issue for your vehicle...however if the charge is accurate, the issue would be more so in the air temperature doors which is located deep inside the dash...i hope this helps...good luck!

try unhooking battery for a few minutes this will cause actuators to do a full sweep and reset. if it is still stuck then will need to replace the actuator for blend door on that side

There is a thing called a blend door, it controls air temp, that is where the problem is, most common issue is the motor that operates the door fails.