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Weil Mclain Ultra 105 - b25 code
blee
Member Posts: 5
I recently did a maintenance kit on my Ultra 105,
About a day or two later I started getting a b25 error message. It came and went, but every few days it showed up more frequently over the course of the last 2 weeks. Now I woke up this morning and the boiler wont stay on for more than a few minutes and is constantly showing the b25 code
Any ideas?
I'm a newbie, so I don't know any technical terms or abbreviations
About a day or two later I started getting a b25 error message. It came and went, but every few days it showed up more frequently over the course of the last 2 weeks. Now I woke up this morning and the boiler wont stay on for more than a few minutes and is constantly showing the b25 code
Any ideas?
I'm a newbie, so I don't know any technical terms or abbreviations
0
Comments
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(This is what I've found so far in the Weil Mclain Manual)
FIRED WATER BOILER SERIES 1 & 2
Instructions in this supplement are based
on factory default parameter settings.
SOFT LOCKOUT
[Display flashes 9, then b in first position; last two digits on steady (code)]
25
Outlet water temp rose too quickly - burner off for 10 minute wait (burner recycles, increasing wait 1 minute each attempt, to a max of 15 minutes)
1 - Possible hot water return from DHW tank.
2- Make sure system does not have trapped air preventing proper flow.
3 - Inspect and verify system piping and components.
4 - Verify piping agrees with boiler manual recommendations.
5 - Verify proper circulator(s) operation.
6 - Possible loose connector on boiler outlet sensor. Tighten connector.
7 - Possible bad boiler supply outlet sensor0 -
Another thing I noticed, when doing the maintenance kit, the cover plate that is supposed to be torqued to 50 inch lbs was hand tight. I took 7 of the 10 nuts off by hand which was kind of odd. When I re-installed the cover plate I torqued them to 50 inch lbs0
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Now it is throwing an E 36 code as well
"Outlet water temperature sensor open circuit"
1. Inspect outlet water temperature sensor and wiring.
-Replace sensor if wiring correct and in good condition.
-Replace low voltage wiring harness if problem persists.
-Replace control module if harness replacement doesn’t resolve0 -
Make sure all the connections that may have been disconnected are back in their proper places.
Especially those two sensor wires.
D0 -
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New sensors should have come with the maintenance kit. If it worked before you worked on it, then Occam's razor.0
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what may I ask is Occam's razor?HVACNUT said:New sensors should have come with the maintenance kit. If it worked before you worked on it, then Occam's razor.
This is always a fine line-------"it worked before you came to do the maintenance...."0 -
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Well, I was searching for b25 error code because my boiler was throwing this code again. First result from google was this thread I originally created, lol.Thanks everyone for your replies!Also thanks to Tom_133, I just ordered a 383-500-300. Mine is falling apart and splitting in 2, after I seen this thread I went over to the boiler and pressed down on the sensor and the plastic cover snapped back in place and the boiler is up and running again.
I was just about ready to start firing up some electric heaters 😅0
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