Have Toyota Questions? Ask a Mechanic for Answers ASAP
Hello and welcome to just answer and allowing me to assist you with your problem, First a couple questions to get a better picture of whats happening.does the fan run on all speeds?You said you changed the cabin filter? What I'd like you to do is remove the cabin filter and with a light and mirror see if you can see the plastic motor impeller on top of the heater motor and if it has any debris in there that may restrict air flow. It's common for creatures to make nests in there. Hope this helps and if you need further assistance I'll be happy to do so.