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NTI Matrix M100 Boiler ER4

JDenasio
JDenasio Member Posts: 3
in Gas Heating
I have a NTI Matrix boiler that shows a ER4 periodically when the furnace component is running when there is a demand for water. I never have an issue during the summer months.
I replaced the low pressure switch, manifold limit and stack limit.
Any help will be greatly appreciated. Thanks

Comments

  • motoguy128
    motoguy128 Member Posts: 393
    Any chance the 3 way valve isn’t switching?   Might cause a high limit trip.  
  • JDenasio
    JDenasio Member Posts: 3
    I see it switching from on to auto.
    I've also been noticing lately when the furnace first turns on in the mornings the ER4 error pops up. Once I reset it, it runs with no issues.

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