A weak battery would do that
I have same issue except I am on cold and get clicking when attempting to go to heat. also rear areas have heating or cooling
Beetles make a clicking noise!! (: (: (: (:
Ford F-150 will not start all it does is make a clicking noise
The bearings might be bad in the alternator.
Is kinda like a squwicky wimpery clicking noise
When the battery does not have enough voltage to turn the starter over it will sometimes make a clicking noise.
The brakes may make a clicking noise if the caliper is going bad. I just changed the brakes and the rotors and discovered my car was making a clicking noise. The garage I took it to replaced the caliper, so now it doesn't make the noise anymore.
The clutch assemble is shot...
Orca whales make a odd sort of clicking noise underwater... >:O
A bad resistor can cause your BCM to make a clicking sound. The clicking noise can be caused by the relays and replacing the BCM will fix the problem.
is the humming coming from the front end of the vehicle? i have a 1996 explorer with the same issue. yes the noise come from the front but not all the time seems to make the humming noise when it gets hot