Unless your interior windows are frosted up

Or its minus 30 and your face is getting frostbite


But in reality option 1....if you cant see out you shouldn't drive it....and no scraping the inside of your windshield is not a viable option.

 

... why dont you just remote start it a couple minutes before you leave?

 

OP is complaining about engine idling high that he is waiting for idle to drop, for which there is no need.

Never got frostbite inside a vehicle. Of course if you cannot see then you wait until you can, which will be a lot longer than 3 minutes.

 

https://www.f150forum.com/f118/confu...h-disp-398472/

https://www.f150forum.com/f118/2015-...ctions-325846/

 

Fine....

OP stated 'Why does it take like 3 min for the engine to warm up. I mean its pinned at 1.5 RPM and then slowly goes down to under one.'

Answer 'truck is designed with a bunch of parameters to determine when do drop to low idle'

Ricktwuck stated 'There is no reason to warm up your truck. Start, go.'

Response 'Unless your interior windows are frosted up and needs time to clear' just pointing out there are in fact reasons one of which is a major safety hazard that unfortunately many people fail to follow.

 

That's what remote start is for..

 

Bob is correct, obviate this with remote start.

 

Or clear the moisture out of the cab before parking it, and you won't have icing on the inside of the windshield (the outside is much easier to scrape)—just run the AC and defrost on full cold for about the last 2-3 minutes before you park, and get out quickly once you park. Should be enough to dry out the air without freezing you too badly.

 

Why use full cold? Just turn the heat on and AC.

 

If you cool the windshield enough before stopping, it also reduces the chance that stuff will melt and freeze on the outside after you park.