Heat and air temperature settings

[Faithful94]

howdy , my 94 h/a temp setting is a pushbar at left cold, right hot, it won’t adjust any more has anyone delt with this and have a solution stuck in midrange heat

 

[DerekTheGreat]

Is the display for temp flashing? Try and disconnect the battery for 30 seconds or the HVAC control unit itself. Might just need a reset.