Insinkerator hot water heater takes a long time to dispense water

Sounds like the temp is too high, turn down the temp the dial should be on the front of the unit

Turn off the water supply from the heater and at the main water supply line outside. place a container under the sink where the flick mixer is mounted to catch the water that will come out of the lines when you undo the fittings.
there should be 2 flexible braided lines coming from the mixer to the water supply lines, undo both fittings from those lines, then undo the brass nut that fastens the mixer to the sink, you may need a 10 or 12mm socket with an extension bar to get up under the sink to be able to undo the nut.
there should be a metal horseshoe shaped retaining plate that holds the mixer to the sink which should come off when the nut is undone.
You may or may not have to remove the flexible lines from the mixer which you should be able to sort out when you get to that point.
I hope this info helps you with your problem, the info may not be exactly how I have explained but that is how most mixers are fitted or removed.

This unit is set way too hot. The steam is pressuring the water out of the unit.

Check all the connections, take the cover off after you shut down the power. If the connectors are not leaking, replace it

Replace it

Jan 2013
1) If the tank is leaking, then Replace with new dispenser.
http://waterheatertimer.org/How-to-install-under-counter-water-heater.html

2) Add comment and attach photo of leak.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Replace water heater if tank wall is leaking.
These things have short warranty period.
Stainless steel will theoretically last longer, but steel tank water heaters have replaceable anode rod to prevent rust-out.
http://waterheatertimer.org/How-to-install-under-counter-water-heater.html
http://waterheatertimer.org/Replace-anode-rod.html

Be sure to recycle the old metal.
http://waterheatertimer.org/How-to-recycle-water-heater.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Usually happens when the temperature is set too high, check your instruction book and set it to the advised temp. Also the filter in the nozzle may need a clean.

Probably debris from old filter got trapped in the line.
If the insinkerator has aerator, take that off and flush out debris.
Otherwise, the line will have to be taken apart and blown out.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

if it was me i would try to get vinegar into it let it sit for a while and flush it out