Question about Heating & Cooling
If this occurs when the unit is in use for only hot water, there will be an internal leak in the secobndary heat exchanger, you will have to replace it. check first that the charging link has been removed when testing to ensure it is not passing.
if it happens when the heating is switched on then check the presure in the expansion vessel ( dump all presure from system and use a car foot pump with a gauge there should be 1 bar presure) that is the big red thing behind the pump, if water comes out of the test valve on the front of it when you try to test it or it wont hold the presure you will have to replace it (a nasty job you have to strip half the boiler) if you can pump it up make sure you release the presure in the system as you pump it or you will get a false reading
Posted on Sep 07, 2008
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 05, 2013 | Water Heaters
Oct 20, 2011 | Combi Centre DX - Mango
Feb 28, 2011 | Water Heaters
Dec 05, 2010 | Water Heaters
Sep 15, 2017 | Bosch Water Heaters
Apr 23, 2010 | Heating & Cooling
Apr 17, 2009 | Water Heaters
May 12, 2017 | Heating & Cooling
Mar 20, 2018 | Dometic Heating & Cooling
142 people viewed this question
Usually answered in minutes!