Question about Ford E-350 Super Duty

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Why wont ford E350 heater control wont go from cold to hot

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Posted on Jan 02, 2017

  • 49 Answers

SOURCE: Heater only blows hot (well, warm) on full speed of fan

Replace the temp control on this car, it should be electrical control not cables.

Posted on Dec 03, 2008

  • 1619 Answers

SOURCE: merc c class heater problems centre blowing cold and sides hot

Bad vacuum pod, try using a mini vacuum and the on the valve block behind the glove box take suction on each one till you find the bad one.

Posted on Jun 15, 2009

  • 25 Answers

SOURCE: ford e350 dash controls don't work switch

Well, there is a vacuum canister under the hood that stores vacuum for the heater. Yes, this could be the problem, or it could also be something electrical. By the sounds of your problem i would lean towards a vacuum problem. The vacuum canister will black in color and usually round, it will be on the passenger side, usually by the heater box. there will 2 vacuum hoses on it. Are you hearing any hisses coming from the dash area, or under the hood? That is another sign you have a vacuum leak as well. Hope tihs helps you out....

Posted on Oct 23, 2009

  • 1 Answer

SOURCE: 1988 Ford F-150 4x4, the heater blows cold air,

I would try to replace the thermostate again, Sometimes these can get damaged in the warehouse. Cheap to try it again, $12-$15

Posted on Jan 04, 2010

  • 8589 Answers

SOURCE: heater control switch wont switch from cold to hot

your blend door actuator is stripping it's gears. I do not have the manual on where your door actuator is. It's usually right of center under the dash. Look under there and see if you can see anything trying to move when you change the temperature setting (or follow the ticking sound). If you can find the actuator, take it off and see if you can manually rotate the door hinge. If yes, replace the actuator. If not, you will have to remove the heater box to find out why the door is jammed. The actuator looks like this


Posted on Oct 21, 2010

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