Maybe that heater is air bound and needs to be bled. Remove "cooler" heater hose and let water run through heater until water runs hot--be careful HOT Water!!!
More likely is that the heater core is clogged. Mark the hose that is cool - this hose is the return from the heater core to the engine. Let the engine cool, carefully release any pressure in the system by slowly removing the radiator cap. Remove the two heater hoses at the engine block. You can adapt some garden hose fittings into the hoses. Connect your water supply to the heater hose you marked, connect a length of hose to the other heater hose and place the end into a 5 gallon bucket. This will allow you to see anything that is flushed out of the heater core. Slowly open the valve on your water supply. You are now reverse flushing the heater core, and probably have seen a bunch of crud enter your bucket as soon as you started the water flow. Flush until no more crud is visible entering the bucket, remove the garden hose hookups, reinstall the heater hoses at the engine, fill your radiator to the top, reinstall the radiator cap, start the engine and let it warm up to operating temperature. Check for heat.
How do i remove a heater core to a 1974 chevy impala?
how to replace a heater core on 1994 impala ss
do you need to remove dashboard in 2003 chevy impala to replace heater core
Need to know what it does not do.
Would depend on what year impala On a 63 impala or many of the early ones you need to remove the passener side fender. The remove the power wire from the blower motor. Then remove the heater hoses. then remove the heater box from the fire wall. the heater core is inside that box. Newer models I am not familiar with
adllawn@comcast.com
The heater core can be found behind the passenger side kick plate. Remove the water supply hoses from your 1996 Chevy Impala heater core. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
behind the glove box area
my heater doesn't work in my 04 Chevy impala. My coolant levels are correct, and this still does not correct the problem. Could it possibly be the coil in the dash. If not what could problem be?
If the fan is not blowing, a fuse may be the cause. If there is just not warm air being blown by the fan, check your coolant level in your radiator. Low level of water and coolant will cause the heater to blow cooler air.
To change the heater core in a 1963 Chevy Impala, disconnect the negative battery cable and loosen the radiator cap. Remove glove box door and remove wiring connected to the heater core. Then remove the heater core from under the dash and replace with new.
under the hood