A/c blower / heater issue

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jmunky85, Oct 21, 2015.

Oct 21, 2015 #1

jmunky85 Bobtail Member

1

0

Oct 21, 2015

0

I have a Detroit S60. The Air condition constantly blows through the vents and will not shut off. I try to turn the heat on to test that and it does not blow out any heat. Any ideas on what can be causing this?

jmunky85, Oct 21, 2015

jmunky85, Oct 21, 2015

#1
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Oct 21, 2015 #2

baha Road Train Member

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Jul 25, 2013

ga

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What model truck do you have that S60 in?

baha, Oct 21, 2015

baha, Oct 21, 2015

#2
Oct 22, 2015 #3

kalh7 Light Load Member

186

62

Mar 28, 2007

southern illinois

0

Could be the relay, replace it with one of the others and see if it turns off.

kalh7, Oct 22, 2015

kalh7, Oct 22, 2015

#3
Oct 22, 2015 #4

boneebone Road Train Member

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Mar 13, 2009

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Without knowing the Make and Model of your truck, it sounds like it be your Blend Air Door inside your dash, it controls according to the position of the switch on your dash, when it should open or close to let cold or hot air flow through your dash vents.

boneebone, Oct 22, 2015

boneebone, Oct 22, 2015

#4