My tankless water heater in my 5 year old home has had intermittent ignition problems since about the first year. The Plumbing Company that the contractor used did not install the system properly and has been a problem and expense. Sam from Matthews Plumbing Solutions spotted the error in seconds corrected the install problem in a few hours and I am confident we will not have problems in the future. I have found the Plumber and the Company I will be doing business with in the future. Thank you Sam and Matt.