What causes my stove top to randomly beat approx 8 times in a row every 2 minutes for sometimes up to several hours, sometimes a few minutes, sometimes quite all day?

It depends on several factors. First, I'll assume when you "reset" the range, you are resetting the circuit breaker (cb) in the cb panel.
If this is the case then there are two possible causes. 1. The cb is old and worn out. So replace it. 2. There is an occasional overload of the circuit. This causes the cb to trip. For that you will need a qualified electrician to determine what is causing the overload. WARNING!!! Ranges are typically 220 Volts which can kill a person. So leave this up to the pros. Do Not attempt to do this work yourself.

Sounds like the thermostat maybe defective.

Try turning off power to stove for a few minutes then re try

Replace the sensor probe, as that is what the code stands for.

Er42 constantly slashing on my stove top, sometimes lasted for hours. When that happened you can't use the stove top until it stops. What should I do to stop the slashing?

Hi,
Here is a tip that I wrote that will help figure out why the burner spark keepson clicking...

Gas Range RepairBurners Keep on Clicking
heatman101

your spark modual got shorted with the liquid you sprayed in there or spilled you can try unplugging it overnight to let it dry. at least 24 hours or you can take the cooktop of and get a hairdryer and dry out the spark modual.or if you wait 24 hours - 3 days and still not dried out you need to replace your spark modual but more than likley give it time it will fix itself.

The continuous sparking stopped after few hours. Looks like the water dry up and that fixed the issue.

Hold your finger or thumb on the red light for a few seconds, and you will hear three beeps. This tells you that the lock is off. If the light is not on, do the same and there will be three beeps, and the light will come on, telling you that the lock is back on.