Do six cylinder cars cool your car better than four cylinder cars?

[taxi]

17. On some cars the relay to the a/c compressor is controlled by a module

When the car's computer receives signals that are outside predetermined levels the a/c may not come on at all, even though nothing is wrong the a/c. An example is when the temperature of the coolant in the radiator is higher than expected; the reason for the higher temperature can be for any number of reasons, including a low coolant level, a fan not operating properly, or a bad temperature sensor. Switching off the a/c reduces the amount of power the engine needs to put out. A bad sensor may send a fault code but not necessarily trigger a malfunction indicator light - for example, if reducing the load cycle on the a/c brings the temperature down the a/c will operate less efficiently and the MIL will remain off.