I'm putting this hand in this format instead of a bidding problem because I'm interested in an answer to the ethical question more than the "what would you bid if you can ethically".
1C=Precision (16+)
1S=5+ spades, 8+HCP
2S=trump asking bid
3C=five spades, one of top three honors
3D=control asking bid in diamonds
3NT=second round control (K or singleton) in diamonds
4C=control asking bid in clubs
4D=no first or second round control of clubs
4H=control asking bid in hearts
XX=...Your memory of the partnership agreement regarding redouble is that you are showing first round control of hearts. However, when partner is asked for an explanation, his response is "no first or second round control"
Given partner's mistaken explanation, are you done over 4S, or do you feel you are ethically able to make another call?
Benefits include:
Plus... it's free!