Delta tub/shower gradually goes cold
I have an unknown, Delta brand crystal handle, single handle tub fixture that works fine for a few minutes, then gradually goes cold. You have to shut it off and remix the water to get it corrected, then it does the same thing. I replaced the springs, cam and rubber boots that fit over the springs. This seems to be a very hard to find fixture. It is at least 15 years old and there is no evidence of it on the Delta.com site. It may be a 1300 or 1400 series or a 100, 200, 300 series. It has a push button diverter. I can find no markings on it anywhere. Any help is really appreciated.
Thanks in advance.
Does it do it for both the tub spout AND shower head?
Does it do it for any other hot water in the house?
Have you tried to take out the springs and cups and try to observe what happens if you flush the lines? If you do, plug the tub drain so you can see if any foreign debris comes out.
If say the whole house were affected this way, then what can cause this is a blockage in the cold waterline somewheres before the hot water heater. What happens is the initial water pressure and volume are pretty normal right in the beginning. But then peters out when the water heater cannot be recharged fast enough to maintain maximum pressure. Then when you shut the water off and wait a few seconds and try it again, the water pressure and volume once again ibecome good, because the water heater charges back up again – only for the pressure once again to peter out, etc., etc..
In this above described scenario, fiddling with the position of the mixer valve should really have no affect on it. It is only in shutting it off and waiting, and then turning it back on, that causes this.
But, if your problem indeed will remain, even after shutting off the water, but will ONLY fix itself by ‘remixing’, as you say, then you must have something going on right in the mixer.
