Heat 2nd gen

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cxf

Junior Member
Joined
Nov 2, 2017
Posts
12
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Ram Year
1999
Engine
5.9
Hi I’m back again. I just went through replacing the crank sensor and cam sensor as well as new cap and rotor. Truck is running great but, always a but, I now have no heat. Is the blend door vacuum operated and could I have knocked a vac line loose when working blindly on the cap/ rotor or cam sensor? I am at work and do not have my dodge manual with me. Thanks in advance.
 

thestuntboy

Senior Member
Supporting Member
Military
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Nov 3, 2017
Posts
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Location
CT
Ram Year
1999 2500/2001 2500/2018 3500
Engine
8.0/5.9 gas/6.4
If you had heat before then more than likely a vacuum came loose. Look at the back of the engine on the right side for a loose hose. You might hear some whistling at the connection port.
 
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Nealuss

Senior Member
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Mar 8, 2016
Posts
137
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Ram Year
1994
Engine
5.2L 318
Yes you absolutely could have. There is a vacuum tee by the firewall on the passenger side of the intake with a check valve in it. When disconnected it should default to defrost only.
 
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