Thanks for your question. Delta Faucet model T17430 does have a rotational limit stop that may need adjusting to allow more hot water to flow through the valve. To remove the temperature knob to begin the adjustment, squeeze the sides of the knob and then with your other hand, pop it off underneath the small end.
Included here are the instructions for adjusting the rotational limit stop. The directions are on page 9.http://www.deltafaucet.com/customer...