1999 Honda Accord ac makes loud noise on med or high

There should be a high speed blower relay that bypasses the resistor for slower speeds.
Check with an auto parts store or the dealer.

I do not think that the battery change and the noise for the a/c is related, probably just a coincidence.

If the a/c makes a loud noise when it is turned up, I would try switching to vent to see if the noise is still there. If it is, then it is the ventilation fan likely located on the firewall or under the dash under some plastic paneling.

There is no reset button for the a/c.

Good luck on this repair.

I THINK YOU WILL FIND THE CLUTCH BEARING IN THE FRNT OF THE COM PRESSOR HAS HAD IT .800-900 DOLLARS SOUNDS LIKE AREBUILT EX CHANGE UNIT OR POSSIBLY ANEW ONE ,I WOULD LOOK AROUND FOR SOMEONE TO JUST FIT ANEW BEARING. IT CAN BE DONE THE OLDER TOYOTAS AS I HAVE DONE IT BUT THEY ARE RIGHT IN SAYING YOU CANT LEAVE IT "YOUDOIT"

its probably the compressor that has died pricing depends on where you get it from

My blower was making a terrible noise that got louder with higher fan speeds. Air flow was very low also. I removed the blower motor (located under the glove box; secured by three screws and a snap off electrical connector) and removed a large amount of hair and debris from the fan. This was about a 10 minute job and everything is normal now.

the compressor clutsh is gone , you will need a new compressor

go back to it an check the fins they may be rubbing on the cover.

It could be the ABS. MY HONDA DOES THE SAME THING.
I took it to PepBoys yesterday and they could not connect to the
computer interface.They said I need to take it to a honda dealer
so they can connect and determine what is wrong with the
Automatic breaking system. The noise is the ABS motor
turning on and off.

is your ac compressor located on the left side as well and also try your ac if its not blowing to cold the rattling could be your ac clutch on the compressor if that is you will have to get a new clutch kit from your local auto parts store to fix it

You may have a clogged heater core, leaking heating cores still provide heat.