Just to be certain, you are discussing the electrically controlled valve which admits/blocks hot water to the heater core?

If so, I think you will be fine. The valve is binary - either fully open, or fully closed. The controls modulate the amount of time it is open to regulate heater core temperature.

So long as it generates a strong enough magnetic field to close the valve (default is fully open, as I'm sure you well know...) you should be fine. The slightly higher impedance will just reduce current draw a bit - which should be fine for the controlling electronics. Lower impedance and the resulting higher current draw would have been a problem.

1,150 windings, huh? You must have more spare time than I do!

- JimY