I have an old Tower 3834C Slow Cooker, which is still in good working order. I need to know when it is on High and Low?

If timing does not allow the recipe to be cooked on low for as long as required, the slow cooker can be turned up to high and the cooking time reduced. Convert cooking time by using a ratio of 2 hours of cooking on low as being equal to 1 hour of cooking on high.

The third setting

Hope this is the one
HAMILTON BEACH PROCTOR SILEX 33650 User Manual

just a suggestion but off, low, high and auto would seem to make good sense to me.

A timer would probably work for a slow cooker with only a switch for low, medium or high on the front of the cooker, but this slow cooker requires that after you plug it into the wall you have to tell it how you want it to cook, it won't start cooking automatically. In other words, you have to press buttons to make it cook. Hope that's clear, I know sometimes I'm not.

This slow cooker has 3 settings LOW, HIGH, & WARM
When you plug the slow cooker in the display should show a "0". When you press the "COOK TIME" button, the display should go to 1 then 2 then 3 etc. each time the "COOK TIME" button is pressed. If 1,2,3,4,5 or 6 hours are selected, then the slow cooker will operate on the "HIGH" setting. If 7,8,9, or 10 hours are selected, then the slow cooker will operate on the "LOW" setting. To start the cooking cycle press the "ON/OFF" button. To interrupt the cooking cycle at any time, press the "ON/OFF" button. When the cooking cycle is complete, your slow cooker will automatically switch to the "WARM" setting. If the "ON/OFF" button is pressed when the the digital display shows "0", then the slow cooker will automatically start on the "WARM" setting.
If the "COOK TIME" button does not change the display numbers then unplug the slow cooker and hold both buttons down as you plug the slow cooker in. Keep the buttons pressed for a count of ten, then release them and the slow cooker should work correctly

The manual basically says... This slow cooker has 3 settings LOW, HIGH, and WARM. W hen you plug the slow cooker in the display shows "0". When you press the "COOK TIME" button, the display should go from 0 to 1 to 2 to 3 etc. each time the "COOK TIME" button is pressed. If 1,2,3,4,5 or 6 hours are selected, then the slow cooker will operate on the HIGH setting. If 7,8,9,or 10 hours are selected, the slow cooker will operate on the LOW setting. To start the cooking cycle, press the "ON/OFF" button. To interrupt the cooking cycle at any tim, press the "ON?OFF" button. When the cooking cycle is complete, your slow cooker will automatically switch to the WARM setting. If the "ON/OFF" button is pressed when the digital display shows "0", then the slow cooker will automatically start on the WARM setting.
If the "COOK TIME" button does not change the display numbers, unplug the slow cooker. Hold down both buttons and plug the slow cooker in and keep them pressed down for a count of 10. Release the buttons and the slow cooker should work now.

As to the the slow cooker recipes...Try going to www.goodbks.com and search for "Fix-It and Forget-It" cookbook for starters.

As to then 4 or 8 hour timing I'm assuming you don't have an owners manual for it. I would start out treating it as a 4-hour timer and adjusting the times for various dishes aas you learn the cookers "personality"

Hope I helped a little!

on setting 1 (low),the slow cooker can operate all day and night if required

when set to 2 (high) it is very much like a covered pot on the stove.food will cook in half the required time

AUTO the slow cooker will cook on 2 (high) until the food reaches a pre-set temperature,then switches to 1(low) and maintains a constant slow cooking temperature.Auto is ideal for someone who is leaving the house for the day 8-9 hours please feel free to share this information.If you have any more ? please fell free to contact me.
bianca

If you choose the auto selection the slow cooker will cook for three hours on high then will automatically reduce to the low setting.