We removed a mouse nest and replaced cabin air filter. The problem developed around that time
Driver's side AC does not blow cold air. Passenger's side does on 2003 Toyota Highlander
Not sure about toyota , but if it has 'dual zone' temp controls low refrigerant can cause that problem in some vehicles.Would be a strange coincidence. Did you find any mice high on R-134?
The mouse may have damaged the vent control door or module.