If there is power to the tube but the new tubes are not lighting is this a faulty ballast issue?. There are no starters on the fitting.
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T5 fluorescent tubes not working., help
- Thread starter AndyP
- Start date
In my experience, the connections at the ends are often dodgy. Try just slightly twisting the tube while it's switched on, not so far as to release it so it falls down, just a little, to find a better connection. The tube won't be too hot to handle.
Are the cathodes heating? (are the ends hot)
Earth path near the lamp is required usually for T5. Try stroking the lamp with your hands - ends towards the middle. if it lights you have an earth problem.
No heat at cathodes means lamps not fitted properly or failed ballast. Could be other things of course like a wire not connecting somewhere.
Earth path near the lamp is required usually for T5. Try stroking the lamp with your hands - ends towards the middle. if it lights you have an earth problem.
No heat at cathodes means lamps not fitted properly or failed ballast. Could be other things of course like a wire not connecting somewhere.
Tried wriggling tapping etc no joy.
Tubes not hot and tried stroking again nothing.
It is a twin fitting. All four connections are live.
Will see if we can find a ballast locally. Thanks.
Not mine BTW. at my brother’s in UK.
Tubes not hot and tried stroking again nothing.
It is a twin fitting. All four connections are live.
Will see if we can find a ballast locally. Thanks.
Not mine BTW. at my brother’s in UK.
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Before blaming the ballast, do a quick check on the tube(s).
There should be continuity between each pair of pins on the tube.
Note that it is quite common with modern ballasts for both tubes not to light when only one might be at fault.
Bob
There should be continuity between each pair of pins on the tube.
Note that it is quite common with modern ballasts for both tubes not to light when only one might be at fault.
Bob
Thanks, we have just had the tubes tested both OK. Too late to find an electrical store open so the ballast will have to wait until Monday.
Unlikely but they are the right tubes? there are 2 wattages per size and the wrong one probably will not light up. High wattage version are harder to find hence unlikely.
Yes tube specs identical.