The most common signs of a heater core problem is either leaking antifreeze or a mist coming from the air vents. There will also be a sickly sweet smell in most cases.
You know the heater core is bad when your truck leaks antifreeze onto the floor of the passenger side.
The first sign that a heater core is bad is the lack of heat from the blower motor on a vehicle. The second sign that a heater core is bad is water on the floor of the passenger side foot well on a vehicle.
On the 1994 BMW 530i, the heater core is located under the dash in the engine compartment. You know the heater core is bad when it starts to leak.
normally you have no heat and,or water on the passenger floorboard
bad heater core bad heater core
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
your windshield seal could be bad or you may have a bad heater core if it is leaking bad you'll know soon enough, its the heater core!. Mines doing the same thing and its the heater core. The bad news is that the part is only 75.-100. bucks but the labor will eat you alive.
Check the heater core, it is probably bad. It could be heater hose connections to the heater core, but I would bet on the heater core going bad.
A bad smell coming from the heater in a vehicle can indicate a bad heater core. One way to check this out is to see if the smell is worse when you sit in the passenger seat. If it is, there is a good chance the heater core is bad.
The most common signs of a bad heater core are; no heat or fluid leaking into the passenger compartment. The heater core can have a leak or it can be plugged.
coolant on the floor
the only other way is that it is cloged