What i meant was to avoid paralleling the gates especially when one mosfet is not used.
Cascading power mosfets does not work, not like that, and on several considerations. On signal mosfets probably could use a pullup and would get an inverter. But these are not signal mosfets, these are power mosfets so trying to charge the gate with a pullup is not reasonable from my point of view. Anyway an inverter would not be good either, because it would mean that heater is on when the uC does not produce any signal, e.g. when uC is off, and that would be very dangerous.
Cascading power mosfets does not work, not like that, and on several considerations. On signal mosfets probably could use a pullup and would get an inverter. But these are not signal mosfets, these are power mosfets so trying to charge the gate with a pullup is not reasonable from my point of view. Anyway an inverter would not be good either, because it would mean that heater is on when the uC does not produce any signal, e.g. when uC is off, and that would be very dangerous.