RE: Local “Red Tag” codes and requirements

We had an interesting conversation about furnace tagging / disabling 

If you have any local laws / codes / standards that apply to this conversation please post them here


BryanOrr Pretend Internet Professor Asked on March 11, 2018 in Residential HVAC.
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This comes up a lot here in Minnesota expessially if you work in Residential. I see a good amount of cracked heat exchangers in a heating season and what we do is inform the customer about the possible dangers of the issue. I will turn the gas off to the unit. ( With then watching) I will Put a red tag on the unit with both of our signatures on the tag with a discription of why the tag is There and leave the unit like that . It is  the customers choice at that point to make the decision to fix it or repair it. We don’t disable the unit or anything like that.

I perform a combustion annalasis on the unit to make sure it’s not creating high numbers of CO (anything over 400 is a red tag) anything over 100 we look really close into it and try to bring that number down. it iskind of rate to see a unit with a cracked heat exchanger creating high numbers of CO it is usually a differnt issue.


Rookie Answered on March 14, 2018.
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