This is a Ford group. Aerostar questions are appropriate for this group.
The radio should not become that hot. Does it become hot during the summer?
If not, I would think the problem is that heat is escaping from the heater
somehow. What happens if you leave the radio off? Or alternatively, leave
the ignition and radio on while the engine is off?
If it gets hot in the summer, I imagine this could still be hot water going
through the dash or an electrical problem.
Radios should not get any hotter than a regular household transistor radio
would get (in other words, hardly warm at all).
And you base this on what? Car radios have voltage regulators and
output chips that generate heat. many run warm. Some i have seen
i think run TOO warm. And its normal. If all four speakers are working
with no distortion and the tape/cd is ok, don't worry about it.
Are your lights really bright?
I had a similar occurance once, and it was due to a faulty alternator
regulator which tried to put 17 volts into the battery.
If that is your case, you may have done some electrical system damage
along with a really cooked battery.
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