Can a convection fan be used to cool a radiator?
If it’s cold outside (but not so could that it would prevent using the A/C), natural convection should cool the radiator adequately. Well the short answer is yes. The A/C requires the fan to run as part of the heat exchange process. The A/C runs on a separate circuit and is triggered by A/C system.
Why does my radiator fan not come on?
Simply the engine is not hot enough to turn on the cooling fan, its not hot enough outside, you are driving getting plenty of air flow through the grille to keep things cool without the assistance of the fan. Its possible that you have no problem at all.
Why does the fan not kick in when the AC is turned on?
As long as the AC performs normally and the coolant temp stays in the normal range, the high speed fan operation is not necessarily required and just because the high speed fan doesn’t kick on the moment AC is turned on, doesn’t mean something is broken.
When does the condenser fan come in with the AC on?
The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold.
Why does the radiator fan not come on when the AC is on?
In order for the AC Condensor to do its job it must stay as cool as it can. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem.
Why is my a / C compressor not coming on?
If there is voltage to the sensors and nothing past the sensors, then the system is low on refrigerant. If there is no voltage to the sensors, then the a/c switch would need to be replaced. The cooling fans and condenser fans either are not coming on from a loss of power or the motors are burned up.
Why does the engine fan not come on?
The engine fan needs to come on to remove heat from the A/C condensor, but it doesn’t come on. With good A/C condensor cooling on the highway, the A/C functions ok. In city driving with little to no air flow over the A/C condensor, it’s miserable. What to check? Wiring, a sensor, a module, Toyota, ?
As long as the AC performs normally and the coolant temp stays in the normal range, the high speed fan operation is not necessarily required and just because the high speed fan doesn’t kick on the moment AC is turned on, doesn’t mean something is broken.