HVAC Questions? Ask an HVAC Expert for Answers ASAP
Hi, my name is XXXXX XXXXX I have been in the home improvement and repair field for 20 years. I will be very glad to help you today. So you may already know that the code indicates no pressure rise when the pump turned on. You may also know that may indicate that the water pressure sensor or pump is bad or not enough water in the appliance or even air in the system. You may also know that the error is very difficult to assess as the indications of the code are broad. Often the internal pressure vessel is at issue. Very often upon installation the pressure is not adjusted to match the incoming main pressure. Many times this can be corrected by installing an external expansion tank. I hope your plumber comes back as this problem can cause some plumbers to stop returning phone calls!
If you have further questions please do not hesitate. If I am offline I will respond as quickly as I can.
Is the internal pressure vessel the same as the expansion tank? Could this have a leak inside? Would replacing this tank solve the problem
Is the internal pressure vessel the same as the expansion tank?
Would replacing this tank solve the problem? My house is up for sale and I want it to work AND look good.
The internal pressure vessel has a diaphragm in it. If the diaphragm is broken then it would be easiest to add and external pressure vessel instead of replacing the specific internal or check the pressure and check the diaphragm of the internal pressure vessel and pressurize or replace as necessary.
How do you check the diaphragm? Would the heating work sometimes if there was a small leak in the diaphragm as mine is doing? Would all plumbers know how to do this?
Yes the plumber would certainly know how to check it. I think it is likely fine except the pressure needs to be adjusted on it.
The pressure has been adjusted but it doesn't last - that's the problem. From the last adjustment it lasted 36 days. It has a new sensor valve and the pump is obviously working as it's working now but this has been on going since November. My plumber obviously doesn't know what to do next - are you a Vaillant specialist? Sorry to keep asking questions but I don't feel I've got any further.
No problem. I am a plumbing expert and I do know that this is a troublesome issue for a lot of plumbers. The pressure that was adjusted was likely not the expansion vessel. If it was then it may be leaking. I am sorry that you feel you have not gotten any further. I am unsure how else to explain. Possibly if you could talk to your plumber and explain as I have explained he will understand what to do?
Thank you for your time & help; I just wish you were my plumber!
You are very welcome