I put cleaner into the ac drain and it must have gotten into the heater.. only when the heat kicks on do I get the chemical smell .. I am thinking of taking the going in and removing parts to clean it out.. do I have to remove and replace the heater core or can it be cleaned out?

it only blows the chemical when heater is engaged.. .not when A/C is on or heat is off.. which part would you guess the chemical is coming from ?

about 3/4 of a 17oz can of SUPERCOOL EVAPORATOR CLEANER and ODORIZER ..

Hi Matt... I had a musty smell in my car .. i shot up evaporator foam in a/c drainedge tube under dash .. now the musty smell is gone.. but!! now i am being killed by the evapotator foam smell still 2 months after only when the heat kicks on . ., did i get the foam too far up.. how hard would it be ...