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Not necessarily. It depends on what you mean by a bad heater core. The core will either be leaking or stopped up. If it is leaking, then it can cause the engine to overheat and the only fix is to replace it. A clogged or plugged heater core can sometimes be fixed by flushing it. You can also temporarily bypass the heater core until you can get it fixed. Just connect the inlet & outlet heater hoses together.
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Could a Heater core on a 1500 Chevy will it make it overheat?
No, a clogged heater core will not make it overheat. A leaking heater core will.
Will a leaking heater core cause your car to overheat?
A leaking heater core will cause the engine to overheat because the coolant is leaking out.
How much does it cost to replace a heater core for a Mazda 6?
how much is to replace heater core on 2004 mazda 6
Why would a 1984 Town Car overheat when you use the heater if you changed the thermostat six months ago?
water pump may not be worn out, heater core may be clogging
Location of heater core 1994 Mazda mpv?
The heater core in a 1994 Mazda MPV is under the dash on the passenger side. The dash has to be taken apart to change out the heater core.
How do you change a heater core on a 2003 Mazda tribute?
The heater on the 03 Mazda Tribute is going in and out. What is the problem and how can it be fix?
How do you remove the heater core from a 1995 Mazda 626 1 liter engine?
You will need to drain the anti-freeze from your 1995 Mazda 626 cooling system. Remove the water lines from the heater core. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
How do you change heater core on 93 Mazda protoge?
Replacement of the heater core on a 1993 Mazda Protege is going to first require the removal of the entire dashboard. Once that is removed then the heater control box will need to be removed and disassembled in order to get access to the heater core inside.
How do you bypass the heater core on a 91 Mazda Protege?
Remove both heater hoses from inlet & outlet of heater core. Connect these hoses together.
How do you re-place heater core for 1984 Lincoln town car?
how do u re-place a heater core for a 1984 Lincoln town car
Where can you get a heater core for your 1984 Isuzu P'up Are any other model trucks heater core the same?
beside the engine
How does one replace the heater core in a Mazda B3000 6 cylinder?
2000 mazda b3000 down stop fan blower Heater up hill
