Can switch up to 750W incandescent or halogen lighting / 750W fluorescent lighting / 100W compact fluorescent lighting and 100W LED lighting. Please Note this product is not suitable for discharge lighting. Timeguard NTT03 Features This is a bug, it is not what the documentation says and is not what the Horstmann did, and is not what any reasonable person would expect .. a BUG. i fitted this for my elderly parents who find it very easy to use. it is constantly lit and the 'boost' function is easily used, and it is also easy to program. it stores programs and time during power failure once its internal battery is charged. I have an FST77 timed fused spur for my immersion heater, works fine. My electrician fitted a TRT036N two channel central heating controller, to replace an antique Horstmann unit, and it work fine EXCEPT the 'copy' function is broken .. if you set heating and hot water times for Monday, for instance, and then copy them to Tuesday, the central heating timings are copied to the hot water setting for the new day (as well as to the heating timings). The Timeguard NTT03 24 Hour/7 Day Compact Electronic Immersion Heater Timeswitch is a compact and easy to use digital 7 day timer, which fits on a single gang wall box. It can control outputs of up to 16A which makes it suitable for domestic immersion heaters. Features:

If a product fails after six months of receiving the item it is considered a warranty claim and is the responsibility of the buyer to pay for the return postage. We will then dispatch a free-of-charge replacement once the original has been received and tested. Book a DPD Return Here as mentioned i added an 'economy 7' program so that they take advantage of the off peak electricity. it keeps very good time as well. On balance I decided the fuse and switch were not so important because this timer is connected to its own mcb and there is a double pole isolator higher up in the circuit. I have used Fastlec three times each time I have found them to be efficient fast and happy to give you information on their products." Timeguard support agree that is what happens (and tell me that their three channel unit actually works as you would expect) but their solution is that they should change the documentation. I am still awaiting (3 days and counting) a call from the customer service manager, since first line support are unable to help. Whether this level of testing applies to more products than the TRT036N I can only guess, but I am not impressed so far.Timeguard NTT03 is a compact, programmable 24 hour/ 7 day electronic immersion heater time controller that fits on a 32mm single gang flush wall box. It has 4 ON + 4 OFF programme periods per day and 28 ON + 28 OFF programmes per week with the shortest switching time of one minute.