Dual zone heat
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Junior User
Joined: Sep 2003
Posts: 73
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From: LongLake Alberta
Dual zone heat
Well guys it was 40 below heading up to Fort Mcmurray yesterday morning. The 6.7 was running great but the heat on my side was poor and onthe pass side was hot. Played with the control but can't get good heat on the dr side. Warr is over. Any thoughts. Or time for a heater module
Thanks Don
Thanks Don
Senior User
Joined: Feb 2007
Posts: 146
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From: Northern VA
what happens if you turn off dual mode and just use single-zone climate control?
The last time I ever took apart a dual-zone climate control unit was when I was removing the entire heater box/evaporator core out of my 1998 BMW. There were three hoses that went in to the heater box (instead of the regular two) in the firewall. One for driver's side, one for passenger's side, one for return. Usually, it's one in and one out. I'm not sure how our trucks work, but I have to assume it's similar, so it's possible that hot coolant isn't circulating through one of the lines that feeds the driver's side.
But, to narrow down if it's a physical problem versus a control unit problem, put the climate control in single mode and see if you get good heat out of both side floor vents, which is where most of the heat is directed.
The last time I ever took apart a dual-zone climate control unit was when I was removing the entire heater box/evaporator core out of my 1998 BMW. There were three hoses that went in to the heater box (instead of the regular two) in the firewall. One for driver's side, one for passenger's side, one for return. Usually, it's one in and one out. I'm not sure how our trucks work, but I have to assume it's similar, so it's possible that hot coolant isn't circulating through one of the lines that feeds the driver's side.
But, to narrow down if it's a physical problem versus a control unit problem, put the climate control in single mode and see if you get good heat out of both side floor vents, which is where most of the heat is directed.
Mountain Pass
Joined: Dec 2009
Posts: 224
Likes: 7
From: Regina, Saskatchewan
Well guys it was 40 below heading up to Fort Mcmurray yesterday morning. The 6.7 was running great but the heat on my side was poor and onthe pass side was hot. Played with the control but can't get good heat on the dr side. Warr is over. Any thoughts. Or time for a heater module
Thanks Don
Thanks Don
Postmaster
Joined: Sep 2006
Posts: 2,598
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From: Maryland
Definitely not 3 years, but with several people already reporting over 100,000 miles on a 2011, I bet his miles are up!
Super Moderator
Joined: Aug 2003
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From: Isanti, MN
Nope, but many have over 36,000 miles.
Posting Guru
Joined: Jan 2010
Posts: 1,616
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From: Whitecourt AB, Canada
General warranty is 60,000km for a vehicle purchased in Canada (which is like 37,282 miles) and since Ft. Mac was mentioned I could very easily believe the high km.
Ummm as for the DATC problem I'm not sure 'cause I don't have that feature, it's still cold even when you override the thermostatic control and set to 'HI' on both sides? Temperature blend door not jammed or anything? Have to determine if it's a electronic issue or a mechanical issue...
Ummm as for the DATC problem I'm not sure 'cause I don't have that feature, it's still cold even when you override the thermostatic control and set to 'HI' on both sides? Temperature blend door not jammed or anything? Have to determine if it's a electronic issue or a mechanical issue...
Senior User
Joined: Aug 2011
Posts: 125
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From: Delta British Columbia
Well guys it was 40 below heading up to Fort Mcmurray yesterday morning. The 6.7 was running great but the heat on my side was poor and onthe pass side was hot. Played with the control but can't get good heat on the dr side. Warr is over. Any thoughts. Or time for a heater module
Thanks Don
Thanks Don
Took it to the dealer and they had to pull the unit, i was told that they've had a couple 11's come back for that same issue.
I know they had to take apart the entire dash assembly incliding my center consel cause to get to it though.
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Lead Driver
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2011s have an issue with the blend door... I newer one was made for 2012 and up... There is a TSB out on it.
I fixed my 2011 with a Forscan App, ran a diagnostic check and it fixed the HVAC as it moves everything around. Mine was so bad no heat or AC would come out of any of the vents.
I fixed my 2011 with a Forscan App, ran a diagnostic check and it fixed the HVAC as it moves everything around. Mine was so bad no heat or AC would come out of any of the vents.
Freshman User
Joined: Feb 2004
Posts: 46
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The dealership already replaced the blend door actuator then later found out that was not the problem, still charged me $280. now they say it will be $1550 to replace something else, so now I'm trying to figure out exactly what is wrong and hopefully do it myself.
Freshman User
Joined: Feb 2004
Posts: 46
Likes: 0
2011s have an issue with the blend door... I newer one was made for 2012 and up... There is a TSB out on it.
I fixed my 2011 with a Forscan App, ran a diagnostic check and it fixed the HVAC as it moves everything around. Mine was so bad no heat or AC would come out of any of the vents.
I fixed my 2011 with a Forscan App, ran a diagnostic check and it fixed the HVAC as it moves everything around. Mine was so bad no heat or AC would come out of any of the vents.
