Low hot water pressure in shower

[Soniccruzer]

2018 MA 4531. I’m having an issue with hot water pressure in the shower with 50 psi park pressure. I have good hot water supply everywhere and good pressure except when I turn to full hot in shower, good pressure with cold selected
Scott

 

[Neal]

Any issues at other faucets, trying to rule out your mixing valve in the shower. How about water pump vs. city water? Any difference there?

 

[Soniccruzer]

Water pressure and hot water supply is good everywhere except when shower handle is moved from cold to hot.

 

[Soniccruzer]

With pump on no change

 

[Neal]

It sounds like a bad mixing valve, or just how it works. Try using the diesel burner for hot water and you may not need to go full hot as you may be compensating for the electric elements not being able to keep up.

 

[Soniccruzer]

It’s just hot water pressure in the shower. Cold shower pressure is good and hot water is good everywhere. Due to low pressure it takes awhile to get hot.