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HVAC question

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Old

Dec 30, 2017 | 09:20 AM

#1

xxxsherpa

Thread Starter

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Fleet Mechanic

Joined: May 2017

Posts: 1,382

Likes: 13

HVAC question

Used the RECIRC(?) button for the first time this morning, its the top right hand button in the cluster. When pushed, it sounds like an additional fan is engaging, is this so? In the olden days it only closed a door to the outside. Does anybody know for sure how it all works? I'm sure the OM would tell me but I really like to type with two fingers.

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Old

Dec 30, 2017 | 09:58 AM

#2

jimzpsd

Cargo Master

Joined: Feb 2017

Posts: 2,435

Likes: 732

From: Wisconsin

Club FTE Silver Member

When selecting recirculate, the hvac is drawing in air from the cabin (interior) instead outside the cabin (exterior), and from this you hear the blower fan more clearly.

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Old

Dec 30, 2017 | 10:41 AM

#3

xxxsherpa

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Fleet Mechanic

Joined: May 2017

Posts: 1,382

Likes: 13

If that is the case...it sounds like turbo mode when the button is pushed! Does yours make this sound? I don't think its a "more clearly" sound.

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Old

Dec 30, 2017 | 12:06 PM

#4

jimzpsd

Cargo Master

Joined: Feb 2017

Posts: 2,435

Likes: 732

From: Wisconsin

Club FTE Silver Member

Yes, mine is louder too

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Old

Dec 30, 2017 | 12:17 PM

#5

bhbdvm

Junior User

Joined: Nov 2017

Posts: 89

Likes: 0

From: Asheville, NC

This may be a default setting to increase fan speed because many people will use the recirculate to cool the cabin quicker in the summer?

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