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is this normal or do I have a problem

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Old Feb 19, 2015 | 11:05 PM
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Default is this normal or do I have a problem

on my 97, I hit the key, car starts, then radio comes on, then a few seconds later the climate control comes on. some times the climate control takes a little longer to come on, some time its right away. I sit there wondering if its going to work or not, then it comes on. is this normal or a problem? been this way since I bought it 2 years ago, no change.
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Old Feb 20, 2015 | 12:36 AM
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How bright are the numbers on the climate control? It maybe that the pellets need to be resoldered.
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Old Feb 20, 2015 | 01:21 AM
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Originally Posted by kennedy759
on my 97, I hit the key, car starts, then radio comes on, then a few seconds later the climate control comes on. some times the climate control takes a little longer to come on, some time its right away. I sit there wondering if its going to work or not, then it comes on. is this normal or a problem? been this way since I bought it 2 years ago, no change.
I assume the radio comes on because you left it turned on when you shut the car off the last time. You can blame the brilliant GM soldering process that produces cold joints for you issue. That is why your Climate Control to failing. You can re-solder it yourself or, replace the module.
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Old Feb 20, 2015 | 06:15 AM
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Originally Posted by kennedy759
then a few seconds later the climate control comes on. some times the climate control takes a little longer to come on, some time its right away.
If you are talking about the display itself then yes it's a common problem. I fixed mine using the link below
https://www.corvetteforum.com/forums...splay-fix.html
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Old Feb 20, 2015 | 07:48 AM
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its not just the display, it also the fan and back lights
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Old Feb 20, 2015 | 09:19 AM
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This is an issue that you can see when the ignition electrical contacts are going south. The HVAC unit has two sources of power. One that is always HOT and another that is HOT in ON, meaning ignition ON.

Here is a link to look at, note Post #6:

https://www.corvetteforum.com/forums...305-97-ac.html

If it were me I would rig up a voltmeter to the HVAC HOT in ON feed and monitor it to confirm. Don't know how handy you are around electrical circuits. You will have access to the HVAC unit if you decide to replace the ignition switch.

The ignition switch contacts are a well know weak point in the C5. If you want to discuss options PM me and we can discuss on the phone.
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Old Feb 20, 2015 | 10:22 AM
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Another point needs clarification. What setting do you have on the HVAC controller set to? (automatic or something other) What is the temperature outside?

If it is heat and automatic mode, the blower will not blow forcefully until there is actually heat in the engine. Once there is heat to extract, it will begin ramp up the blower speed.

A dim display is something entirely different. That is likely due to the solder joints going south in the unit. As stated, that is an easy repair.
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Old Feb 20, 2015 | 11:50 AM
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looks likes it a ignition switch problem, so will change out in the future, for sure before my trip to Carlisle pa in the fall.
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Old Feb 20, 2015 | 01:04 PM
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Similar thread...

https://www.corvetteforum.com/forums...305-97-ac.html

...I would suspect the ignition switch.
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