I HAVE A UTILITECH PRO 180 #0205881 AND IT BLINKS WHEN ITS ON

light sensor failed or covered in dirt. or you have set it on double switch that means the stay on. to turn off permanent light flick the power on to the lights on off on. should go back to timer that has been set. 3 5 10 min.

It appears, no you can't use a dimmer on these lights. You can try a CFL / LED rated dimmer, but it still may not work

Most submersible pump motors are interchangeable.
A 230 V motor will run cheaper. Be sure to get the correct HP motor.

Read the instructions that came with your liight (sic).

B and Q

There is a starting capacitor on the motor pump, check this out if faulty then replace it.

Sounds like the sensor has failed. The controls are supposed to be on the underside, and kept dry.

I know this is an old post but in case it helps someone else:

I had the same problem. On the sensor head (the bottom part of the light), you will see a plastic dome that can swivel about 360 degrees. Just behind that is a tiny dot maybe 1/8 inch in diameter. If you cover that dot with several layers of white tape the flashing stops and the light stays on. This defeats the dawn to dusk functionality because the light will always think its nightime, but I can always turn it off using the switch in the morning. The light is extremely bright when it is on, but many people struggle with the sensors never working right. If I hadnt already siliconed the light to my siding block, I would try to bypass the sensor altogether. For now the tape at least stops the flashing and I have light.

The AutoChron 81000 Programmable Wall Light Switch Timer is identical to the Utilitec #0357930 (AmerTac) TMDW50L. Here are links to manuals for models prior to and as of 2012.

Before 2012

As of 2012