Determine what you want to do.
Best chemical to unclog heater core.
Be prepared for some more coolant coming out.
Contaminated air conditioning and heater evaporator cores can cause foul smelling health threatening mold and mildew deposits.
Hot coolant that has passed through other parts of the engine is run through the heater core as air is forced past it and into the cabin of the vehicle to heat it.
You may need to.
How to unclog a heater core.
Take a look the hose clamps and figure out which tool you need to loosen them and remove the hoses.
Have the other end in the bucket to collect the coolant and sediment that comes out of the heater core.
Same as the outlet hose gently twist and pull the hose off.
Remove heater core inlet hose.
Attach the longer section of tubing to heater core inlet.
Best heater core flush works 100 of the time.
A clogged heater core will prevent the coolant from passing through it limiting the amount.
A heater core s inlet and outlet can usually be accessible at the.
If the heater core is small or the core is reduced in volume because of calcium and rust build up you may have to use 1 2 a bottle of et106 and perform the flush twice to get more complete cleaning.
If the inlet hose is hot warm and the outlet hose is cold you can pretty much determine your heater core is clogged.
Restricted or clogged heater core servicing with.
Locate the easiest way to reach the heater core s inlet and outlet.
If the heater core hoses are not easily accessible and you have no desire to attempt unclogging the heater core yourself at least you ve isolated the problem and can describe the procedure.