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Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 21976
Experience:  40+ yrs. experience as a licensed oil & gas technician.
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I have a weil mclain ultra 80. i keep getting a 25 error. i

Customer Question

i have a weil mclain ultra 80. i keep getting a b 25 error. i am not a plumber but is there something i can do to eliminate this error. i do have an indirect boiler attached, could it be set to cold and all i have to do is raise the temp?
Submitted: 1 year ago.
Category: HVAC
Expert:  Rick replied 1 year ago.

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.

An E25 error is an "outlet water temp rose too quickly" error. This could be cause by air in the boiler loop or a pump that isn't working properly or possibly an issue with the sensor. Unfortunately none of these causes can be resolved by a quick fix or a simple adjustment. You're probably going to need to call a plumber to fix this.