fogatti tankless water heater e8 error code

Fogatti Tankless Water Heater E8 Error Code

Error code E8 on Fogatti RV Tankless Water Heater indicates wind pressure switch failure. The unit will constantly throw this fault code if: 

  • There are loose wind pressure switch connections
  • The wind pressure switch gets defective
  • Control board failure

To reset the error code, you must address and resolve those issues. 

Fortunately, I am here to walk you through the troubleshooting steps to fix the problem. 

So, let’s dive in. 

Troubleshooting Fogatti Tankless Water Heater E8 Error Code [3 Easy Solutions]

These three reasons are responsible for the error code E8: 

Follow the wiring of the wind pressure switch and see if the wire connection comes loose. Don’t forget to check the wiring for visual damage. 

If the wire connections seem loose, tighten them up. Or, replace the wiring with a new one if the wire connection gets broken. 

The wind pressure switch won’t perform its job when it’s at fault. With time, the pressure switch will wear & tear. In this case, you must replace the air pressure switch to bring the unit back into working condition. 

How To Fix:

Follow the steps below to replace the air pressure switch like a champ: 

  • Remove the screws that hold the air pressure switch in place.
  • Disconnect the wire terminal and the pressure pick-up tube attached to the air pressure switch. 
  • Get a new air pressure switch and connect the wire terminal and the pressure pick-up tube you disconnected earlier. Ensure you connect the wiring and the pressure tube to the correct ports. 
  • Once you connect the wire terminal and the tube correctly, reassemble the air pressure switch by screwing it to the fixing plate. 

A control board on an RV tankless water heater is like a human brain. It controls all the activities of the tankless water heater. If it’s at fault, your Fogatti RV Water Heater will keep throwing the error code E8. 

How To Fix:

Replacing the control board will reset the error code E8. Go along with these steps to replace the control board like a pro: 

  • Ensure you turn off the electric and gas supply to your RV tankless water heater.
  • Remove the front access panel and locate the control board. 
  • Open the cover of the controller box and unplug the connecting wire terminals from the control board. 
  • Disconnect the switch wire terminal and remove the controller earth wire. 
  • Unplug the feedback pin cable terminal.
  • Now, unscrew those nuts that keep the control board in place and remove the controller. 
  • Install the new control board and secure it with the five screws. 
  • Plug in the switch wire terminals. Then, connect all the wire connectors to the controller. Next, ensure you plug in the feedback pin cable terminals and secure the controller earth wire. 
  • Finally, cover the control board with the provided plastic cover. Open the power switch and open the line controller to check the circuitry. 


Wind pressure switch failure is what the Fogatti RV Water Heater Error Code E8 suggests. You can reset the fault code by tightening the loose wire connections, replacing the wind pressure switch, or replacing the control board. However, if you are not handy, call a certified technician to make the replacements for you to resolve this issue. 


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