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Are you referring to the vent lid?
Or is this a pop up camper?
IF this is a pop up camper, the ratcheting mechanism is probably broken and that is what makes the "clicking" sound you hear. It also holds the sprocket in place so it can't come back down again. Not something most people can repair by themselves. IF you are already out camping you might be able to call a mobile tech in that area to come and assist you with this. Hope that is helpful here. Please get back to me if you need more on this as all follow ups are included in our fee.