For the past week there's been a lot of air coming out of the hot side of our faucets. Water that's white with air bubbles. I hope it's air bubbles. Cold side is fine. What does this mean? Heater is of 1990 vintage. I'm looking into a new one this year. Should I speed up the search?

Thanks,
Sixto
93 300SD 3.0

I've seen that in ones I've just installed when new copper piping and soldering was involved. The flux dissolving.

I can't say what it is in your case. Is it ultra hot? If so, the thermostat might be bad and it's over-heating. Usually the pressure relief valve will pop open when the pressure gets too high if that's what's happening.

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1986 300SDL, 362K
1984 300D, 138K