Fault code e4

This appears to be a malfunctioning switch that indicates cooker has built up pressure. So it may be a leaky lid or the pressure release valve (on top of lid) isn't seated well. It could be that the switch is dirty (perhaps from cooking overflow).

From this site http://www.fixya.com/support/t5273731-displays_e2_e4_5_qt_wolfgang_puck the fix appears to be easy.

Good Luck!

Hi Noreen,
The "e4" is an error code. You need to search online for "error code e4 + your make". You should then, at least, know what the problem is.

Factory reset the slow cooker. To do this, and this is only an educated guess as no information is available in the user manual for this device, is hold the clear button if there is one while powering it off, or press the + and - buttons simultaneously and hold for several seconds to clear the screen.

The problem is a Signal Switch Malfunction. It has to do with the power switch and the pressure switch from what I have been able to find out. Mine doesn't have a pressure problem it just goes to E4 once you set the time. I gave the switch a good smack and it has been working for a while. This is the second time and this worked both times now. I am sure the switch will have to be replaced at some time. From what I have seen this is a very common problem. There is one way to fix this problem, albeit not the best. I was able to bypass the E4 error by completely bypassing the electronics and wiring the heater coil to get power whenever the pressure cooker is plugged in. It was a very simple job, anyone with any electrical experience can do this. The only problem is that it is a safety concern as there is no way for the heater to turn off even if pressure is getting to be way too high. There may be a pressure relief valve in the lid but the heater coil won't shut off, so don't leave it unattended! But at least this way to you can still pressure cook. Pics of process: http://s909.photobucket.com/albums/ac295/danwat1234/fixing%20the%20pressure%20cooker/

Here is a piece from someone who had the same E4 error problem:

I had this problem. I noticed that steam was coming out almost immediately and the cooker would not start counting down. Eventually, the "E4" display would appear. I determined the steam vent valve (loose piece) was not seated on the vent hole in the cover so the pressure never built up. I removed the loose piece which consists of a metal cylinder and a black plastic cover with a handle. The plastic cover was so far down on the metal piece that it would not allow the metal cylinder to seat on the vent. You can use the metal piece by itself or work the plastic cap up far enough so that the metal piece seats on the vent in the closed position. I have had no more problems - it works fine. good luck! kc

I think E2 means open circuit in thermocouple in center of bottom. E4 means no contact on pressure sensing switch at edge of bottom. Mine had E4 error. Took out switch and used fine sandpaper to clean contact points. Now it works fine.
Remove 3 screws in bottom. Remove bottom cover by turning it ~1/4" to clear tabs. Remove switch at edge of bottom with two blue wires going to it. Clean contacts and replace.

Removed the 3 screws on the bottom. There is a relay near the circuit board. Kind of looks like an old morse code relay. Just tapped out "E 4" in morse code. Plugged it in and it works fine.

There doesn't seem to be any legit way of fixing this. I tinkered with the pressure sensors and valves, kicked the pressure cooker a few times, still the E4 error presented itself.


I was able to bypass the E4 error by completely bypassing the electronics and wiring the heater coil to get power whenever the pressure cooker is plugged in. It was a very simple job, anyone with any electrical experience can do this.


There doesn't seem to be any legit way of fixing this. I tinkered with the pressure sensors and valves, kicked the pressure cooker a few times, still the E4 error presented itself.


The only problem is that it is a safety concern as there is no way for the heater to turn off even if pressure is getting to be way too high. There may be a pressure relief valve in the lid but the heater coil won't shut off, so don't leave it unattended! But at least this way to you can still pressure cook.
Pics of process:
http://s909.photobucket.com/albums/ac295/danwat1234/fixing%20the%20pressure%20cooker/

I fixed mine by elevating it 4 inches (E4) and dropping it on the counter. Something needed a little impact adjustment!

Here is the manual for this cooker; http://www.crockpot.com/manuals/38601-C_English.pdf page E4 and E5 tells you details of programming/timer/temperature. Check through everything and see if you can figure anything out. after cooking, the unit should automatically switch to warm mode, if it isn't doing this then unfortunately i think it needs a replacement control board - probably not worth doing. If you want to give it a try then post again and we can try and source you the bits Hope this helps :)