Hi everyone i need help with my dodge caravan, the lights on the rear windshield lights keep flashing after i changed the battery last weekend. Now it takes about 30 minutes for the lights to go off, but when i turn off the car and start it up again, the flashing comes back. And because of this the heater doesn;t work not even the control where you select where the hot air you wanted to come out from.....
Please help

Try a climate system calibration:

"Turn on the blower. Simultaneously push the top and bottom wiper buttons on the left side of the climate control panel for 5 seconds. All the lights on the panel will light up. Then two lights on the left side will alternately flash for about two minutes and you'll hear the ventilation modes cycle. When just the top light on the left side slowly flashes push that button and you're done. All lights should be out and you should be back to normal. This is the climate control calibration/test and it resets the climate system computer/module."

If your A/C system isn't working don't perform this procedure unless you're willing to put up with flashing lights till it's fixed.