Upgrading MT400 board

nuke_twidget

Well-known member
Feb 29, 2020
60
Houston
Pool Size
14500
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
I'm in the process of ordering a new stack flue sensor for my MT400 and the tech that was out today suggested I upgrade my control board as well. He spoke pretty highly of the new 6 button panel over the older model. I installed my current MT400 in late 2020, so just before the cutover to the new RS-485 enabled heaters. Is the upgrade really worthwhile, or should I just keep humming along with what I currently have?
 
I'm in the process of ordering a new stack flue sensor for my MT400 and the tech that was out today suggested I upgrade my control board as well. He spoke pretty highly of the new 6 button panel over the older model. I installed my current MT400 in late 2020, so just before the cutover to the new RS-485 enabled heaters. Is the upgrade really worthwhile, or should I just keep humming along with what I currently have?
Do you have an automation system that could communicate with the new board? If not, you will get a few additional "bells and whistles," but nothing that will improve the efficiency of the heater. If it works, don't fix it.
 
Do you have an automation system that could communicate with the new board? If not, you will get a few additional "bells and whistles," but nothing that will improve the efficiency of the heater. If it works, don't fix it.
I have an intellicenter control panel, but no real automations set up outside of the basic pump schedules.
 
See https://www.pentair.com/content/dam...m-parts-matrix-connected-heater-update-v1.pdf

Do you have an IntelliCenter to use the new RS-485 connection?

To get the new functions in the updated board you have to replace the PCBA (Main Board), Fenwal Ignition Control Module, and the wiring harness.


The new features include:
  • RS485 connection to IntelliCenter Automation
  • Upgraded menu structure: Flame strength indicator, Runtime, Cycle Count, Error Code Log
  • Ability to control an external bypass valve
  • Six-button membrane keypad
None of these make your heater work any better. I would save your money.