JerseyWiseguy t1_jebwer1 wrote on March 30, 2023 at 9:54 PM

Could be that the valve cartridge is going bad; that seems like the most-likely cause. But, no way to really know for certain, unless you actually replace it.

maxnpj OP t1_jebx48q wrote on March 30, 2023 at 9:59 PM

u/JerseyWiseguy Thanks for the quick reply. What I was really looking for here was somebody to at least agree that I was on track. I know I will actually have to replace the valve to know for sure but I wanted to post here and see if somebody said something like "no way it's the valve, the dinglehopper is yer problem here"

Thin-Concern3387 t1_jeeqqkc wrote on March 31, 2023 at 2:08 PM

Just chiming in to say I had a very similar issue and my fix was buying a new cartridge and changing out the old one which had gotten lots of hard water scales. Old cartridge was a two piece Pfister and replaced it with a newer one and it completely fixed the hot water issue. I unfortunately had to do some tile cutting behind the cover plate to be able to pull out the old cartridge but easy DIY