thomasinnv
Well-known member
as the water pump cycles on and off while using the shower, you get a blast of cold water when the pump comes on. this started about 1 week ago. the pump has always cycled on and off as the pressure goes up and down so i am not thinking that is an issue. however i never had the problem of getting a blast of cold water every 5 seconds or so while showering. i'm wondering if a faulty check valve at the water heater might cause this? i do not have an accumulator so that isn't the issue.