Originally Posted by Wolfstar
We are living in our 2019 Thor Quantum 29KW with a tankless water heater. Turning on the hot water (without engaging water pump) delivers cold, then a brief hot water moment, then cold again. HELP...tired of heating up water in the microwave (we do have electrical hook up - 20 amp - 10 less then our 30 amp load max).
We too had this problem... Is it a Girard WH? I found that it will not turn on until continuous water flow is .8 gallons per minute. And, if you push the pause switch in the shower, you will get a blast of cold water. This wastes a lot of water and if you are dry camping that is a problem. Got tired of hearing the wife yell when that cold water came on. I bought a Suburban 4-gallon* electric/gas WH (*a larger WH would not fit the space). This has worked out great !!!!