Concerning your water pump issue, we had a similar situation on our 2014 Eagle Premier. The water temp would fluctuate wildly when using the shower. The fluctuations corresponded to pump cycles. The pump is a Shurflo 4008. This pump has a by pass feature to control cycling at low flow. The dealer and Jayco had no solution. I finally called Shurflo and was advised to adjust the pump pressure and the bypass feature up. Turning the pressure up 1/2 turn solved the problem.
Hi Sailor,
Wow, could it be that easy? My Shurflo is the exact same model#4008. Two separate adjustments, you say? I've not studied the body or clear filter cup right next to it carefully, but where is the pressure adjustment and bypass located? Any pics please?
On day 5, we swapped out the factory water heater for a Truma AquaGo Comfort model and even so, if one's taking a shower, and the other turns on the kitchen sink hot water tap, cold water will arrive at the shower head in all pressure situations. It's highest temp goes no higher than 120 deg. More than I'll ever desire. Communication with the DW when she wants to wash dishes is paramount, otherwise the war is on. Funny story is when we remodeled our residential home that we sold, for this lifestyle, we put a luxury Delta shower valve that had a preset mechanical thermostat with some magical power to keep the shower temp perfectly stable no matter what other tap was opened and turned to any temperature. I mean you could not tell at all. Before that valve was soldered in, the old shower valve suffered cold water intrusions, say if the washer was going in the garage, or the DW was showering in the guest bath, all with just one 40 gal water heater in the garage...and a far piece away.
It would be just awesome if that technology could be transferred to the RV. Am I dreaming, or is there such a smart valve device on the market? I'm not a plumber, but a carpenter. Tomorrow, I'll post some new mods to the master closet I did for the DW.
Pictured is my WP before Jayco added the pex siphon line. Turn it upside down for correct view, as I have oriented to read the label.