LexusBme Posted May 29, 2014 Share Posted May 29, 2014 I have a 1992 SC 400 126,000 miles. The AC and Heater do not blow to the fullest, more like a vent setting. Fuses have been checked and are all good. Is there a DIY suggestion anyone has to at least narrow down this problem? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
Tomj8 Posted May 29, 2014 Share Posted May 29, 2014 I have a '95 SC400 which blows (AC or heater) at only the highest setting no matter the fan speed selected. I am told this is due to a failed BLower Control Module, which is a small plug-in module that is usually located under the dash near the glove box. I have not yet attempted to locate it and replace it, so I can't verifiy where exactly it is or whether that would remedy the problem but the two symptoms do sound like a fan speed control issue, so it is logical the cure will be the same for both. Anyone with specific information, I would definitely appreciate a post before I proceed. Quote Link to comment Share on other sites More sharing options...
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