In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
1st post and hopefully it makes some kinda scene. Just had the service guy here which seamed to be very knowledgeable. Says the AQ475 needs to be replaced. When we go through the test cycles buy hitting the red test button it makes domestic hot water. That was the reason for the service call, Ice cold shower before work! With out hitting the test button it will not tell the boiler to turn on to create the hot water. The AQ475 has the call for heat led on at all times. If I hit the test button 3 times it fires the boiler. from my understanding all test cycles are working as from what I'm understanding from the manual. The AQ is Also wired through a Argo Industries AZ-4P zone valve control that the tech said is not the problem. Just trying to figure out what it could possible be before going to try and locate a new AQ475 tomorrow. The only trouble shooting the book gives you is out door sensor or supply sensor fail.Which says to replace the sensors.Or self test sequence error, which is replacing the control. Now it says that the control attempts to operate normally, But both the Call for heat and Boiler LED's will flash.I have no flashing LED's at all. My power test, WWSD & Call for heat LED's are constantly lit. So Im lost but and a little confused! Any Ideas or clues are greatly appreciated!