fan cycling?
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Junior Member
Joined: Aug 2006
Posts: 2
Likes: 0
From: Pittsboro, NC
fan cycling?
I have a 2006 SCREW.
Here's the poop, when the heat is on (no a/c) and I switch the blower from 1 to 2, it pauses for several minutes before the fan speed actually increases. This seems to happen randomly and not just from 1-2. They all work, but they just don't seem to come on demand. I don't have automatic climate control, just the base manual system, and I doubt there is any "logic" behind this.
Do y'all think this just the relay block? I'm going to mention it during my next service visit, but I wanted some advice so I don't get the standard dealer BS.
Thanks,
-jack
Here's the poop, when the heat is on (no a/c) and I switch the blower from 1 to 2, it pauses for several minutes before the fan speed actually increases. This seems to happen randomly and not just from 1-2. They all work, but they just don't seem to come on demand. I don't have automatic climate control, just the base manual system, and I doubt there is any "logic" behind this.
Do y'all think this just the relay block? I'm going to mention it during my next service visit, but I wanted some advice so I don't get the standard dealer BS.
Thanks,
-jack
Senior Member
Joined: Nov 2006
Posts: 5,495
Likes: 7
From: Memphis, TN 38135, USA, Earth
I think all those trucks use a solid-state resistor (big transistor) to control fan speed, regardless of EATC or "manual". So I think there IS a logic circuit controlling the blower speed.