Hi,
I have a Vulcan vs 160 gas boosted solar system and a Rheem 20 continuous hot water. Lately the red indicator on the solar monitor of the Vulcan vs 160 is either pulsating/ permanent red when the day is 26 degrees or more. The manual and a search on the internet does not provide much info except to a reference to a temperature sensor fault.
Tech support from Rheem states that it could be a default pump and it will cost around $500 to fix. It is not reassuring to note that a product that is 4 years old could be costly to fix. Appealing to anyone especially plumbers out there for any advice on possible solution to this grey area. thks