mi calefacción del coche no está funcionando

thats how you say it in spanish

One way is "oración todavia funciona".

Or

la oración sigue funcionando

buenas la verda no te se desir pero la luz check gauge te enciende cuando tienes la presion de gasolina baja.

Sorry, that joke, unfortunately, doesn't really work in Spanish. Running and functioning are two different things.

Está tu refrigeradora funcionando?

You'd have to say 'corriendo' for the punchline of "well you'd better go catch it"

To say "my refrigerator is running" you can say "mi refrigeradora funciona".