twolf3820 Report post Posted June 27, 2017 2015 Tiffin Phaeton. Water pump continuously runs when turned on. When the switch is off so is the pump, but flip the switch on and it runs constantly. Share this post Link to post Share on other sites
hermanmullins Report post Posted June 27, 2017 Have you recently filled your water tank and forgot to put the lever back from the full position? Herman Share this post Link to post Share on other sites
twolf3820 Report post Posted June 27, 2017 I run the fresh water with 66percent. The valve is turned to the city water side. There are only two positions on the water valve. City water and fill tank. Share this post Link to post Share on other sites
hermanmullins Report post Posted June 27, 2017 That being the case you may have a bad micro switch in your pump. Good luck. Herman Share this post Link to post Share on other sites
desertdeals69 Report post Posted June 27, 2017 Does water come out of the hose when the pump is on? Mine did and the problem was the check valve at the hose connection on the coach. Share this post Link to post Share on other sites
twolf3820 Report post Posted June 29, 2017 Water dies not come out of the hose when the pump is on but not connected to water faucet. Where would this micro switch be located? On the pump or where? Share this post Link to post Share on other sites
desertdeals69 Report post Posted June 29, 2017 From when the pump first starts running does it slow down or run at the same speed? Share this post Link to post Share on other sites
twolf3820 Report post Posted June 29, 2017 Keeps running at full speed. Last long time I let it run was for little over an hour. Share this post Link to post Share on other sites
abyrd Report post Posted June 29, 2017 Do you have a filter on the suction side of the pump? If so it may be restricted, preventing water to reach the pump. Jim Share this post Link to post Share on other sites
dickandlois Report post Posted June 29, 2017 2 hours ago, abyrd said: Do you have a filter on the suction side of the pump? If so it may be restricted, preventing water to reach the pump. Jim Jim, good point - wonder if a inline valve got turned in the water line connection the pump to the water tank? or the bypass valve for filling the water tank from city water was left open - The pump will just keep running with no pressure build up !!! Rich. Share this post Link to post Share on other sites
twolf3820 Report post Posted July 1, 2017 Just changed the filter, problem still exists. Where is this microswitch located? Anyone know what it looks like Share this post Link to post Share on other sites
hermanmullins Report post Posted July 1, 2017 Twolf, Look at the end of your pump. There is a black plastic housing with water in and water out. The pressure switch is in the housing. Look for the red wire and black wire going into the housing. There you will find the switch. Herman Share this post Link to post Share on other sites
wayne77590 Report post Posted July 1, 2017 Check the inlet of the water pump to make sure that the PEX is firmly attached to the pump. Other fittings could be checked also. Friend had a brand new MH and it would not pump water. The only problem was that the hose fitting on the pump was not firmly on. Share this post Link to post Share on other sites
manholt Report post Posted July 1, 2017 Happened to me 4 days ago. Had disconnected from city water, got distracted and forgot to turn water valve too " in house"! It's a 2 way ball valve. Share this post Link to post Share on other sites
hermanmullins Report post Posted July 1, 2017 Twolf, Just another thought. I know that you checked the City Water/Fill valve. If you can check and see if the ball valve if moving as you return the valve to the city water position. I may be stuck and the handle is moving but the ball may not be moving. Or you may have a ball valve that is not completely closing or just leaking. As I said,just another thought. Herman Share this post Link to post Share on other sites
twolf3820 Report post Posted July 1, 2017 Really can't see the actual ball valve. Tiffin has it hidden behind a plastic "make it look pretty" cover. However, when going from fill tank to city water there is a noticeable sound difference. When filling the tank, I can hear the water. But on the city water, there is no rushing water sound. Going to go after the micro switch next. Will I have to drain the tank in order to remove the pump? Share this post Link to post Share on other sites
desertdeals69 Report post Posted July 1, 2017 On 6/29/2017 at 1:02 PM, Twolf3820 said: Keeps running at full speed. Last long time I let it run was for little over an hour. When it is running full speed is it pumping water? Share this post Link to post Share on other sites
hermanmullins Report post Posted July 1, 2017 Twolf, When you drain the tank I suggest that you install a Ball Valve shut off between the tank and the pump. This will allow you to work on the pump in the future without draining the tank and make other repairs to the water system. I have had a bad check valve in my pump where my tank would overflow due to the city water flowing back through the pump. Shut off the valve, finished our trip and repaired the check valve upon return. But remember to turn it back on when you disconnect from the city water. The DW might will not understand when she doesn't have water. Herman Share this post Link to post Share on other sites
poohbear7278 Report post Posted July 2, 2017 Hello Everyone new here, but I have had this happen also when there is a bypass kit on the water heater and the valves are turned wrong way and my water was just circulating in the system? Share this post Link to post Share on other sites
wildebill308 Report post Posted July 2, 2017 In re reading this thread I had the thought, Have you checked to see if you have water to the pump? Does it pump water? I hate to bring it up but the pump may be bad The motor can run but the pump part may be bad. Bill Share this post Link to post Share on other sites
