Why does my Ford F-150 start on a cold start?

However, when “j asonashton ” noticed that the cooling fans in his 2013 Ford F-150 were spinning on a cold start after having a cooling system issue, he turned to the forum to find out of the fans should be working on a cold start, or if he might have bigger issues.

Why are the fans coming on at Cold Start?

My 2014 3.7 has the fans coming on at cold startup. Has since new regardless of temperature. However, the OP later found the cause of his problem, and it did relate to the air conditioning system. AC was low and refilled, no more cold start fans.

What causes rough idle on a cold start?

I have been experiencing random rough idle on cold start. It generally happens in the morning or when the truck has sat for a few hours. It starts just fine, but shakes and idles rough untill I press on the accelerator, then seems to run/idle just fine. I have repalceded fuel filter, plugs and cleaned the MAF and IAC at regulare service intervals.

What causes the AC to turn on cold start?

So we have somewhat figured most of it out, on a cold start the ac condenser turns on and then the fan, about 10 sec after its started you can hear the ac clutch kick off and about 30 sec after that the fans click off, does anyone know what is causing the ac to turn on cold start?

Why does the cooling fan come on when the engine is cold?

Every time I go to start the car after it has been sitting for an entire day and the engine is cold, when I turn the key to the “On” position, before the engine is even started, the cooling fan comes on. How is this possible when the engine isn’t even running and the engine is cold. Again, the HVAC is off.

When does the cooling fan come on or off?

I’ve read that the cooling fan will run the whole time when either the A/C is on or the vent control is set to defrost, regardless of whether the engine is cold or hot. In my case, the cooling fan comes on when the engine is cold, even with the HVAC off and it will remain running at full speed when the engine is running, again with the HVAC off.

Why does my car fan start when I start the car?

1. The engine control computer thinks the engine is running hot. If the coolant temperature sensor is damaged or the wiring to it is shorted this will cause the fan to run . 2. There is a fault code set in the engine computer that will cause it to operate in a failure mode in that it turns the fan on to be sure the engine will be cooled. 3.

Why is the AC blowing hot air on my F150?

My AC on my 2011 f150 eco started blowing hot air, the compressor clutch stays engaged when I turn the AC on so I tried some of that AC Pro in a can and it didn’t seem to be taking on any of the freon so I stopped. The AC line that you hook the freon up to does get very cold also.

When do the fans run on a Ford F-150?

Old school Ford F-150 pickups had clutch fans that were connected to the front of the engine, so they spun anytime that the engine was running. Modern trucks use an electric fan system with a built-in thermostat system, so the fans only run when they are needed, but they don’t only run when the engine reaches a certain temperature.

What to do when F-150 EcoBoost rattles?

F-150 ECOBOOST COLD START RATTLE NOISE QUICK FIX??? If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer. An error occurred while retrieving sharing information.

When does the cooling fan come on and off?

Only on the first morning start the cooling fan kicks on for about 30 sec just after its started then it turns off, this is the 4th day it’s been happening, a while back I was overheating and the high speed fans would come on but a thermostat fixed that issue, could this be related or is there another issue that won’t throw a code?

Why does my Ford F-150 start on a cold start?