Replace Burnham high limit sensor

[emcee1111]

I have a Burnham Alpine 210 that was installed about 2 years ago. The high limit sensor has had to be replaced a few times now. The last time cost almost $400 due to emergency service. The part is only $35... I have the sensor temporarily jumped out to get my hot water working. Once I get the part, how would I go about replacing it? Is it a simple swap or do I need to flush the system? I've never flushed the system before do I'm not sure what the steps are. Thanks ahead!

 

[DonL]

It is a VERY bad Idea to bypass a safety.

Do you have a Service Manual ?


Good Luck on your project.

 

[Sponsor]

 

[emcee1111]

I have the installation/operation manual. However, it doesn't detail how to replace the sensor. It just has the part number.

 

[DonL]

I have the installation/operation manual. However, it doesn't detail how to replace the sensor. It just has the part number.

What is the part number that you have ?

You should have a Service manual available if you are going to work on it.

There must be a reason that they keep needing replaced.

 

[emcee1111]

The part number is Burnham 101653-01 (High limit sensor). There is definitely a long term issue that I will have a heating specialist check out, but until then I need to get this fix in place.

 

[DonL]

You should not need to drain the system, But you will need to kill power and relieve the pressure.

You may have other problems, and the sensor is working properly.

How do you know it is bad ?

 

[emcee1111]

The high limit sensor is bad, because even when the boiler has been off for several hours (cooled off), it faults on the open limit upon startup (even before firing up the boiler). Also, the part has been replaced by an electrician before. The SAGE controller also displays the open limit on the screen. How would I relieve pressure and restore pressure after? Thanks so much for your help!

 

[DonL]

Maybe Jim will stop by to answer your questions. (Jadnashua)
There are others here that know the Proper start up on those systems.

I work on safety and rocket motor electronic systems.

Them systems can blast off, so I understand.


Good Luck.

 

[SCaNH]

Is anyone else having this same problem with the boiler high limit sensor? I also have a new house that had an ALP210 installed for the forced air heat and the domestic hot water boiler. The boiler was installed in September 2014 and just recently in January started shutting down due to the high limit sensor. Emcee1111 seems to have had to replace this sensor several times. Just wondering if this is a result of some other condition or simply a bad part. Seems like recurring failures is something more systemic than specific part related. Thanks for any additional information on this topic.
I am going to be replacing my sensor today in the hopes of getting the thing to stop shutting down the boiler.