What does F70 mean on a front load dryer?

The F70 indicates a communication error code between the main control on the top left and the user interface on the front. Unplug the machine and remove the top. Check the connection on the board in the white plastic housing on the top left. Next check the connections on the board on the front.

F70 code says...
Replace the machine control electronics. You should first unplug the machine and then remove and plug back in all connectors on the front panel model as well as the electronic control module.

If that doesn't take care of the problem then it may be time to consider replacing the rear board. The FSP # 8183259

The control board is part # 14 in the link below.
Sears parts direct /Whirlpool-Parts/Model-WFW9400VE01

Isnt F70, really is F07... this means Motor Control Unit Error
Description: The Central Control Unit has detected a short in the motor control unit. If a failure occurs during high-speed spin, the door will be unlocked after 3 minutes.

Check or Repais:
- Check wire harness connections between the Drive Motor and the Motor Control Unit (MCU), and between the MCU and the Central Control Unit (CCU)
- Check the MCU
- Check the Drive Motor
- Check the Wire Harness

Hope helps.

The F70 is an internal control problem. It can be caused by a failed central control board or an interface problem. The way to determine which part is bad when the error occurs is as follows:

• If the error occurs when the machine is running then the problem is the interface.
• If the error occurs when the washer is not running the problem is the central control unit.

What is f70? is that an error code? there is no f70. there is an f07 code.
http://www.repairclinic.com/0078.asp
there it will tell you what f07 means and what to check

but if i am way off tell me what exactly you want to know thanks

F70
CENTRAL CONTROL UNIT HEARTBEAT FAILURE
If a Central Control Unit Heartbeat Failure is displayed, no
communication is detected from the Central Control Unit to the User
Interface.
1. Check for continuity of the User Interface harness.
2. Check wire harness connections to the User Interface and the Central Control Unit.
3. Replace User Interface if drum is rotating.
4. Replace Central Control Unit if drum is not moving
I have reseated the cable between the CCU and the User Interface panel (panel has the buttons & lights on it)

We've owned a Whirlpool Duet Washer (WFW9200SQ00) for about 3 years. We started getting the F70 error code intermittently about 6 months ago and it seems to progressively be getting worse. Unplugging the unit for a few minutes resets the error, but it comes back about every 2nd or 3rd load causing my wife a lot of frustration and with 4 kids, our laundry was backing up. After reading several Forum's, I found the F70 error code indicates a "heartbeat" communication error between the various electronic boards inside the washer and the consensus seems to be the most likely culprit is the Motor Control Unit (MCU) board. Before spending nearly $250 for a replacement board (http://www.helpfulparts.com/servlet/the-5733/8183196/Detail) with no guarantee that it would fix the problem, I decided to take the board out of the machine and inspect it. What I found is the connector for the communication (the connector with three blue wires) on this board is a very unreliable connector that uses the edge of the printed circuit board on one side of the connection instead of a real connector soldered to the board. In addition, the fit of this connector seems to loose to make a good connection. I noticed a little bit of corrosion on the board contacts which I cleaned with rubbing alcohol and a pencil eraser. After re-installing the cleaned board we've done several loads with (keeping my fingers crossed) no errors. I am still concerned about the reliability of this connection. Because of it's location, this board is subject to a fair amount of vibration and because of the loose fit I'm concerned that this issue will only come back over time. I've already decided that if the error comes back I will solder wires to the contacts on the board to provide a more robust connection. It's a shame that you can spend well over $1,000 on a top of the line washer, and in order to save $.10 Whirlpool decided to use a very poor connector in a critical area. It makes you wonder where else did they skimp to save a few pennies?!! Our next washer will not be a Whirlpool, and next time will not get a high end washer with all the bells and whistles.

F70 is a "communications error" message and the first thing to check is loose wire connections.

If a loose connection is not found, the controller board will probably need to be replaced.

Please report back here what you find, OK?

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