FIXED Maytag MEDB765FW0 electric dryer won't heat, fault code F4E4

[ccupples]

Model Number

MEDB765FW0

Brand

Maytag

Age

1-5 years

4-year old Maytag MEDB765FW0 has stopped heating
Entering service diagnostics reveals fault F4E4 [L2 Line Voltage Error]
Service test produces L2 000 L1 125 Htr 125 Air 001 [Cannot detect airflow]
Voltage at the terminal block reads 124 Vac on each leg and 248 Vac across both legs
Resistance check across heater element terminals yields no continuity

Do I have a bad heater element and is that the likely cause of the L2 line voltage error, or do I need to keep investigating?

 

[Jake]

F4E4--->L2 Line Voltage Error--->Indicates low L2 voltage (less than 50 V) is detected at the ACU.

Lets check for proper power to the ACU first. Here's your tech. data sheet: https://drive.google.com/file/d/1cLesOLgDjk35OnaQc1NMhGwuLD1evKqu/view?usp=sharing Look on Page 12 where it says TEST #1: ACU Power Check

Since you are getting 240 volts at the wall outlet, next step--->Disconnect Power or Unplug Dryer--->Remove console to access the machine electronics(ACU). Then with a voltmeter set to AC, connect black probe to ACU P8-3 (N) and red probe to P9-2 (L1). (See Figure 2.) Plug in dryer or reconnect power.

You definitely have a bad heating element too if you don't read any continuity on it.

Here's the heating element for your model:
Heating Element Assembly WP3387747


Let us know what you find.

Jake

 

[ccupples]

Thanks for the response, Jake. The ACU power check passes with 124 Vac between P8-3 & P9-2 and 5.08 Vdc between P2-3 & P2-1.

I've found a local source for a replacement heater element that I'll be picking up and installing later today.

 

[Jake]

Ok then yes, the new heating element should fix it completely then.

Jake

 

[ccupples]

Confirmed, the heating element has been replaced and we're back in business.

 

[Jake]

Excellent @ccupples glad to hear the new heating element fixed it.

Thanks for the update!

Jake