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  1. #1

    Default no heater fan on remote start

    Yesterday and today I started my 07 2500HD/ diesel and the heater blower did not turn on. I'm sure it always worked in the past. I tried it with the key and the heater fan ran. I sat in the truck and tried the autostart again and it sounded like the fan started then stopped. Any ideas?
    At the same time after I lent the truck to my neighbour to tow their horse trailer out of the field the service trailer brakes came on. When it stops snowing/ raining I will check the fuses. Thanks and Merry Christmas.
    07 2500HD Duramax , 4DR and 26 Prowler 5th wheel Travel trailer, 57 Chev wagon with 14' Bonair travel trailer, and 71 Nova. ChevyTalk.org Canadian Regional Coordinator

  2. #2

    Default

    Mine works the same when the outside temp is cold. I don't know the on/off temps, but when the air is cold the engine water temp needs to reach a certain point before the fan will turn on. Most of the time (when air is cold) I'm in the truck before the fan starts. I have waited for the water temp to get higher and the fan is blowing full blast on defrost. I guess the idea is to move only warm air.
    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  3. #3

    Default

    The fan comes on, but very slow speed, thanks. On my gas cars/ trucks the fan comes on on high. It's funny I never noticed the fan not on, Merry Christmas to all.
    07 2500HD Duramax , 4DR and 26 Prowler 5th wheel Travel trailer, 57 Chev wagon with 14' Bonair travel trailer, and 71 Nova. ChevyTalk.org Canadian Regional Coordinator

  4. #4

    Default

    Quote Originally Posted by henrys021500hd View Post
    The fan comes on, but very slow speed, thanks. On my gas cars/ trucks the fan comes on on high. It's funny I never noticed the fan not on, Merry Christmas to all.
    Glad you figured it out before you started tearing in to anything

  5. #5

    Default

    Quote Originally Posted by henrys021500hd View Post
    The fan comes on, but very slow speed, thanks. On my gas cars/ trucks the fan comes on on high. It's funny I never noticed the fan not on, Merry Christmas to all.
    Mine will use high under certain conditions. This morning, the truck was covered with ice (at least 1/2"), I used the remote to start the thaw. It ran for about 10 mins and shut off (this is normal), I restarted it (I was working on the windshield), and the 2nd time, the fan kicked into high right away. It would be interesting to see the program that GM uses.
    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

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