Ceiling Fan Light Shuts off After Seconds - What Should I Do?
To answer your question, I want to break this down into two parts. Part A will be the scenario that you have just purchased this fan and it is exhibiting this behaviour after installation. Part B will be the scenario in which you have had this fan installed for many years and are just starting to experience this problem now.
First scenario - just purchased the fan and installed it
Ok, if you've just purchased the fan, installed it, and are now having this problem - return the fan. Quickest, easiest way to resolve the problem. Pick a different model - not the same model. It could be an issue related to the pullchain, that it was not mounted properly to the fan itself. It could be a problem with the receiver. It could be an issue where the pullchain is not quite contacting the circuit properly to relay the signal. It could be this that, there's a lot of different things it could be - because it's just been installed. It'll probably be a whole heck of a lot easier to simply return the fan then try your luck with a different model. It could even be a manufacturing defect, you never know.
Second scenario - you've had the fan installed for years Keyterm years. If it's been installed any less then a year, check the fan serial number with the store you purchased at, or the manufacturer. It's possible the fan may still be under warranty. Some manufacturers offer 1 year warranties, some 2, some 3, some 5. It's all dependent on what you've purchased. Getting the fan replaced or repaired under warranty is always the best option.
If the fan is no longer under warranty...
Now the real fun begins. Open the fan up. You'll need to be familiar with how to use a voltmeter and multimeter. If you are not, then read a couple articles online. You'll be working with live current here though - so be careful. If you don't feel confident, then don't proceed.
You'll need to work with the multimeter in order to determine where the current is failing. First, look at the wires. If there is a split wire, frayed wire, or one that has come disconnected, this will tell you where the problem is happening. Simply solder the wiring back up. However, if there is no apparent break in the circuit, then using the multimeter, you need to find where the current drops off. Start where the circuit begins - check each path on the circuit to determine if the voltage remains the same, or where it drops off, or goes to zero.