How to tell if waterpump is bad

maybe the radiator is shot

sounds like electric door motor is bad in front of the heater core. door is'nt opening

Common causes for over heating are listed below:

1. Lack of coolant
2. Leaking radiator (usually on a seam)
3. Leaking coolant line (usually but not always around the fitting)
4. Bad thermostat - prevents sufficient coolant from entering the system from the reservoir
5. Bad waterpump (will usually leak but not always, can be bad waterpump bearing)

may be either, Is your passenger floor wet? does the heat work? is there a film on the windows?(these are tell tale signs of a bad heater core) is there steam rising from under the hood? does the temperature rise and fall? is the antifreeze a brown color(sign of broken impeller) or is there a loud bearing noise? (these are signs of a bad waterpump)...are there any other symptoms?

The first thing is to check the coolant level, make sure engine is cold beefore removing the radiator cap, then start car with cap off and add as much as needed, this problem is not a bad thermostant, a bad thermostant would overhaet but would give heat, even if it was stuck open the heat would take while to get hot but then car wouldnt overheat, this problem one one of these problems, . low coolant or a bad waterpump, i have seen a few like this and the waterpump propeller rots away and coolant cant circulate, the last thought would be a bad head gasket but you would get heat when driving, so if coolant isnt low then waterpump is bad. hope this is helpful.

Sounds as if fins are worn on waterpump. A pump doesnt need to leak or you to smell it for it to be bad. My bets waterpump, 24 yrs as a ford senior master behind this thought...

u mite have a hole in a hose or maybe you have a blown head gasket. is your car overheating when started? if ya it could be need a waterpump. or a thermostat. its probly waterpump

if its over heating its probably the thermostat or if water pump keeps going bad then there is too much tension on the belt.

Sounds like a bad water pump. If there's no white smoke coming from the exhaust (head gasket) and the radiator and thermostat are good, either the belts are slipping or the waterpump is on it's way out.

check the fan on the radiator it should start before it over heats