Replies

1. 
   [email protected] | Jan 26, 2011 03:44pm | #1

   Maybe?

   I'm not an expert, but have a basic working knowledge: 

   So far as I know the systems are generally air free closed sytems, and the expansion tank is there to contain the expanison of the fluid as the system heats up, and expands.  It can also function as an air trap for any minor amounts of air that are trapped in the system. 

   So, if the system is cold, there probably shouldn't be any pressure. 

2. 
   rich1 | Jan 26, 2011 06:40pm | #2

   Depends on the style of expansion tank.   As a general rule, you should have a minimum of 12 psi in the system. A failed expansion tank will not usually cause a loss of pressure in the boiler.   You really need to get a comptent tech to look at the system.

   BTW, I do know systems.

3. 
   DanH | Jan 26, 2011 07:41pm | #3

   He charged you to look at it, said it was a "big problem", and didn't tell you what was wrong??? 

4. 
   Karen Patras | Jan 28, 2011 08:37am | #4

   The original company sent out another tech., and within a hour we have heat.   Thank you Dave for an informative, and comprehensive fix.

1. 
   cameraman | Jan 28, 2011 08:53am | #5

   Heat is good!!

   I also have a boiler for heating source. Majority of the heating contractors in my area are "scoarched air" or just plain plumbers, If you found a tech that can service your system, hang on to him.

   Make em a batch of cookies!!!!