The only fix for a leaking heater core is to replace it.
Not practical to try to fix a heater core. Replace it with a new one.
You cannot fix or repair a heater core you must replace the complete unit with a new one...........
fixing a heater core requires replacing heater core not knowing what vehicle you are asking about, that's all the information i can give
The heater core is underneath the dash in the middle section right behind the console. You can fix it by removing the dash.
In order to probably repair the heater core in your 2000 New Beetle, you will probably have to get the entire heater core replaced.
COULD BE A BAD HEATER CORE COULD BE A BAD HEATER CORE sounds like the heater control switch needs replacing.if that doesnt fix it, you need new heater core
put new ones on
how to fix 92 camary heater core
Take it to a mechanic and say "will you fix the heater core?"
Replace the heater core. It is leaking.