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Ask HVAC Guru Your Own Question
Category: HVAC
Satisfied Customers: 14604
Experience:  15yrs in the HVAC industry with certificates and degrees.
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My name is ***** *****. I have a boiler question, I had to

Customer Question

Hi - My name is ***** *****. I have a boiler question
JA: Thanks. Can you give me any more details about your issue?
Customer: I had to turn off my main water valve for an hour this morning Water is back on, but I have no heat or hot water Buderus boiler says P10 H7
JA: OK got it. Last thing — HVAC Technicians generally expect a deposit of about $18 to help with your type of question (you only pay if satisfied). Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 1 year ago.
Category: HVAC
Expert:  HVAC Guru replied 1 year ago.

Hello and thanks for using this service, if you have been waiting do not worry or get upset I am just one of the techs on here and I try to get to as many customers as I can and I just picked up your question now.

Have you tried to turn the power off to the unit for a minute and turn it back on to clear the code?

Customer: replied 1 year ago.
Yeah - I did. But I realized that I had turned the two valves underneath the boiler off
Customer: replied 1 year ago.
I just turned those back on. I still have the P12 H7 code
Customer: replied 1 year ago.
But now, the LED under the flame icon is on.
Expert:  HVAC Guru replied 1 year ago.

That code is a low pressure code what is the system pressure?

Customer: replied 1 year ago.
It looks like it's 12
Customer: replied 1 year ago.
12 Psi according to the valve
Expert:  HVAC Guru replied 1 year ago.

Yes that is low can you add water to the system to raise the pressure?

Customer: replied 1 year ago.
Sure- how do I do that?
Expert:  HVAC Guru replied 1 year ago.

Somewhere in your system you have fill valve/prv and a back flow preventer. It usually connects between the expansion tank and air eliminator. There is a lever that will allow you to manually add water to your system. If adding water to your system becomes a regular event, you have a leak that should be addressed. Adding a gallon or so a year is not such a big deal. You need about 18-20PSI...if you have a big leak you have a bigger issue just so you are aware.

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