Have HVAC Questions? Ask an HVAC Expert for Answers
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. Please give me time to respond sometimes I get your replies late so there may be a delay in my response.
Have you had the unit descaled?
Typically this is caused by a combustion issue at the beginning of the cycle, Are they certain the unit is vented correctly and the exhaust flap is working right?
Will Burnham exchange the unit for a new one for you?
HAs any one checked the gas pressures to the unit?
The other cause can be the incoming water pressure, too high causes the issue and too low can also cause an issue. IT should be set at 50PSI I see you say 30-40 has anyone put a pressure gauge on the water? Try this turn down the valve to restrict cold water flow to the unit and see if it vibrates...let me know what happens.
Yes you have too high of incoming water pressure you may need a water pressure regulator on the incoming line then the issue should be solved.
We are on the honor system for our time, all I ask is please rate my service using the STAR RATING SYSTEM on your page before you leave. If you are not happy with the service please let me know before leaving a negative rating. This is the only way I am paid or credited through the site for my time. This will also allow you to get directly back to me for FREE follow up questions and tips are greatly appreciated! Thanks
The water pressure should be 50PSI or less for no vibration. Now I would have an adjustable regulator installed on the cold water side. Adjust down until no noise and see if the pressure is still fine to the house..if it is far too low then you may need to regulate the outport side as well. Yes no noise good thing for sure!
Probably 1 bar- 10 bar set it to 3 that should be 44 PSI roughly
SO when you cut the cold water flow down it stops though correct?
Did the noise ever stop?
If you slow down the water flow on the faucet side does it stop ever?
OK I am out of options I think you have a bad unit and either need to have it changed out or replaced. Based on what you have had done and all the options I went through I see nothing else you can do. There may be something in the exchnager itself from manufacturing or some defect causing this issue.
I will receive nothing then. ...take care
I have nothing to do with payments or anything I am just a tech on the site you can request what you want me to receive and the rest back.