Mitsubishi Lancer HVAC knob stuck between heat and AC since purchase at 63,000 miles on Mitsubishi Lancer

Some Mitsubishi Lancer owners report experiencing issues with the HVAC knob being stuck between heat and AC, which may indicate a problem with the air blend door lever and link. This issue can arise from a hard-to-turn temperature control knob, necessitating repairs that typically involve installing a new air blend door lever and link, lubricating the blend door track, and adding a filter to prevent dirt entry. In some cases, owners may find that a broken temperature control knob or a severely binding heater box is the culprit, as detailed in Mitsubishi's service bulletin TSB-04-44-003. Additionally, a malfunctioning blend air door or an issue with the HVAC control circuit board or CANBUS component could also be responsible for the problem. To diagnose the situation, it is recommended to inspect the blend air door under the dash and have a professional check for errors in the CANBUS controllers using a code reader. Seeking professional assistance may be necessary to effectively resolve these HVAC knob issues in the Mitsubishi Lancer.