tckcumming Posted August 3, 2004 Share Posted August 3, 2004 Good morning, I'm new to this forum... lots of useful info here, very much appreciated. My car: '93 ES300 I read the FAQ for es300/330, tried this suggestion: "You can do a diagnostic on the hvac system by pressing the auto button and the recirc button at the same time then turning the key to on it will display any trouble codes if present ( post if it does and i will tell you what it means)" The HVAC display on my car flashes when I do this, and the number 21 appears on the left side of the display. Is this an error code? What does it mean? The HVAC system seems to be working OK. I also have a question about converting from R-12 refrigerant - I'll do a separate post for that. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
bdonkersgoed Posted August 9, 2004 Share Posted August 9, 2004 Hey tckcumming, There is another thread that discusses HVAC error codes: HVAC Error Codes Thread It looks like it is your Solar Sensor circuit that is giving an error. This doesn't necessarily mean that your solar sensor is bad, it just means that it is triggering the error code. I had the same error code "21" on my ES300 when my A/C was not blowing cold. I filled up the A/C with freon and the A/C blew cold and the error code went away. Good luck, Bryan Quote Link to comment Share on other sites More sharing options...
SKperformance Posted August 10, 2004 Share Posted August 10, 2004 the solar sensor code will always come on if you check it when it is dark it is not an error just it is saying it is receiving no output from the sensor Quote Link to comment Share on other sites More sharing options...
bdonkersgoed Posted August 10, 2004 Share Posted August 10, 2004 Oh yes . . . good point SK. Forgot to mention that. But my solar sensor was triggering an error even when it was light outside . . . Regards, Bryan Quote Link to comment Share on other sites More sharing options...
SKperformance Posted August 11, 2004 Share Posted August 11, 2004 it needs alot of light on it to not trigger it Quote Link to comment Share on other sites More sharing options...
tckcumming Posted August 13, 2004 Author Share Posted August 13, 2004 Hello all, Thanks for the info. Sunny, bright day yesterday (for a change!), so I checked my HVAC for errors... none. I didn't know my car had a solar sensor. I guess it's working OK. This forum is a great resource, especially for those of us who have older cars and like to do some of our own maintenance and repair work. Thanks to all who contribute! Quote Link to comment Share on other sites More sharing options...
SKperformance Posted August 14, 2004 Share Posted August 14, 2004 the solar sensor is the red ball on top of the dash by the windsheild Quote Link to comment Share on other sites More sharing options...
tckcumming Posted August 15, 2004 Author Share Posted August 15, 2004 By the way... Thanks for the photo, skperformance. Bee-oo-tee-full!! :P The car's not bad, either! Quote Link to comment Share on other sites More sharing options...
SKperformance Posted August 15, 2004 Share Posted August 15, 2004 lol at first i was wondering what you meant i know now you can see my new sig and avatar ,as i was wondering ,since i don't remember posting on of the solar sensor Quote Link to comment Share on other sites More sharing options...
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