GE (Jasco) 24-Hour Timer 15070 Clock Dial Not Turning

I had exactly the ame problem. I'm no expert, but I've installed countless ceiling fans, wall outlets, photo sensors & timers. That's why tomorrow I'm going to buy their digital version, so that I can actually see the time changing. What's weird is that the lights do respond to the manual on/off, just as they do for you. I did just as the intructions say, set it for the time & then flipped the pins in/out to trigger the lights. I put it on timer & the lights never came on when they should, later I was told that they came on (much later) & then stayed on much later. It's almost like the timer is moving very slow (not enough voltage). I know on this circuit their previous timer had worked for years, but then was having problems keeping time. We suspected that the old timer was garbage because it was pretty severely beaten up. The pity is that I installed it elsewhere & now have to take another road trip (didn't have enough time to stick around after my initial install) to fix the situation. It's no biggie, but I'm glad I'm not alone. It really leaves you saying, "Dude, I'm not an idiot. This thing should be so basic." And what I wanted was something that people could easily manipulate; something that was a no-brainer. Well, now they're going to have a digital one & I'll be able to KNOW I've installed it correctly & it's working. Sorry I couldn't help, but you helped me in knowing that I'm not alone. Hey, at least the thing doesn't spontaneously combust.

I just picked up and installed the 15070 for exterior lights and had the exact same problem.
That said, I've got a very old house with an ungrounded wiring system. I only HAD 2 wires in the receptacle to hook up to. After determining which one was hot (they're both wrapped in black cloth) and making that connection, I tried hooking up the white (neutral) wire to the remaining wire in the receptacle, which didn't result in anything working. That left the red (load) wire. I've hooked up a lot of timers and other electrical devices (I got tired of every Intermatic timer I installed crapping out after a year or two, which is why I tried the basic GE model) - and I've never run across this "load" nomenclature. I hooked up the load (red) wire, and the lights operated.
I had to cap the white neutral wire coming out of the timer, since there was no other wire for me to hook it up to. I don't know whether I should try to attach it WITH the load wire to the neutral - but right now, the timer's working only as a manual switch - not as a timer.

I just purchased and installed the 15070 and had the same problem. It works manually, but the timer function does not work

Take off the white cover and see if the timer works. The white cover was rubbing against the timer keeping it from working

That timer requires a neutral to work. Unfortunately very often there isn't a neutral wire available in a switch leg.

Just purchased the same timer and here is my problem. The timer works and when I place my ear next to it, I can hear it running. It will turn the lights on but then the timer stops working and will not turn the lights off. Put my ear next to it and can't hear it running. It's almost like it doesn't have enough power to turn past the "pushed out" tabs.

If you are using flourescents they may not work.
Verify line and load wire.

To the guy with two wires in the switch box: The clock motor requires a complete circuit to run -this type of timer will never work for you, You're probably stuck with one of the two-wire timers that pull a little current from the circuit it's controlling (like a lighted switch). I think all of the intermatic digital in-wall timers work without a neutral.
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About the correctly installed timers not working: Jaco products are junk! I have had to go back and replace at least a dozen jasco digital timers (OEM GE brand) because of intermittent reset problems, so I started using Woods/Coleman Cable #59018 and now THEY are using the Jasco POS timer (must be the cheapest)! Next stop is Lowe's, I believe they sell the timer I'm looking for: It has a white lighted on/off button on the front and the door swings downward rather than up from the bottom. It also has a lighter metal mounting bracket that can be easily bent to install in steel exposed-work boxes (I had to cut the Jasco to fit).
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Upon internal inspection of both models, the Jasco has a spot on the main circuit board for an MOV surge protector but it was EMPTY. The other, better design has TWO MOV's, one between hot & ground & another between neutral & ground -Much better protection against noise and voltage fluctuations. Another test: flipping the breaker on/off over and over to simulate noise. Jasco resets EVERY TIME. Other timer never reset, in fct I couldn't cause it to reset under any condition (maybe if I remove the 12-cent MOV like Jaco did to cut costs).
Just goes to prove that Jasco will market a defective product to cut costs. It seems to be working for them since Coleman went with their product to replace one that performed flawlessly!
Dan Weddle www.dxsoundco.com -manufacturer of custom lighting control panels for horticulture.

I had the same problem. I only had 2 wires to connect to in my electrical box, and lights turned on and off, but the timer wouldn't work. I had capped off the white neutral wire, because I didn't have a ground wire to connect it to. I discovered that this timer (ge basic 15070) needs the white wire to be grounded in order to operate. I ended up wrapping white wire around the screw of the electrical box in the wall (the home depot guy told me the electical boxes themselves are all grounded). I put my ear next to the timer and it started to tick! I wrapped everything up with black electrical tape and closed up shop.