Is there only one fusebox (motorcompartment) in dodge caliber 2008? Or is there a second one in cabin?

There are two fusible links. See arrachment.

Check out the videos

https://www.google.com/search?q=2008+dodge+caliber+replace+heater+core+removal

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if the belt is still on the car take a picture to know the routing of it. there should be a decal under the hood somewhere that shows the belt routing.

There is a Dodge website (not from the corporation, but from fans) for Dodge vehicles and they have a subsection on the Caliber. There is a 2007 or a 2008 service manual online there if you join their group. good luck.

The 2008 Dodge Caliber is versatile and has some unique features, but a low-quality cabin and underwhelming performance keep this model near the bottom of the small wagon list. Pros: Versatile interior, available all-wheel drive, wide range of engine choices. Cons: Sluggish acceleration from CVT-equipped models, low-quality interior materials, unimpressive build quality, several important safety features are optional rather than standard.------------------------------------------vas 5054a

1. Turn key in ignition to "On" without starting the car...
2. Depress accelerator fully 3 times within 10 seconds
3. Turn key in ignition to "LOCK". on number 2, do it slowly all the way to the floor but within the 10 seconds

On this website you find fuse box diagram and description for Dodge Caliber (2008)

https://www.carknowledge.info/dodge-caliber-2008-fuse-box-diagram/

https://www.autogenius.info/dodge-caliber-2008-fuse-box-diagram/

get in, turn car to run and press gas pedal to the floor 4 times within 5 seconds

lol, push the button and hold it in for a second

Go take it to the dealer you should still have a full warranty. If you want to try and do it your self you could void that warranty.