Heater Core Explained

A heater core is a device used to transfer heat from the engine hot coolant to produce warm air to the car interior and heats the vehicle's cabin.
Symptoms of a Faulty Heater Core:
LACK OF HEAT
LOSS OF COOLANT
STEAM FROM AIR VENTS
EXCESSIVE FOGGING
OVERHEATING ENGINE
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[@conradconrad7123]

Would a lack of coolant result in poor heating?

[@mattdemers8773]

As long as the fan on the heater core is blowing you will get hot air.
You can help to not destroy your engine when having an overheating issue from a coolant leak by running the heater to help bleed heat from the engine.

[@josephbarrerareyes]

excellent explanation.

[@nondainc]

Thank you for your feedback, Joseph!

[@tariqalmaashani877]

My car has little vibrations and little noise at idle. Rpm is 600 and not fluctuating. No missfire or any codes. What could be the reason?

[@nondainc]

Hi Tariq, you might have a faulty spark plug, unclean fuel injectors, damaged timing belt, damaged motor mounts or blocked air filters. Please check all those mentioned factors. Hope this helps!

[@tariqalmaashani877]

@@nondainc I will. Thanks