Do you have just 30 days to return a defective sensor...

[ratchet]

or one year?  Seems like I read somewhere the system is warranted for a year.

[Brian H]

I believe it is thirty days for Satisfaction Guarantee and standard one year warranty. Unless you bought the extended warranty for an added cost.
http://www.x10.com/support/return_policy.htm
http://www.x10.com/support/forms/warranty_exchange_request.htm

[ratchet]

I believe it is thirty days for Satisfaction Guarantee and standard one year warranty. Unless you bought the extended warranty for an added cost.
http://www.x10.com/support/return_policy.htm
http://www.x10.com/support/forms/warranty_exchange_request.htm

Thank you again!

[ratchet]

So on the possibility that the sensor lid was slightly convex, I put two (if that was the case I'm sure one would have been fine) pieces of duck tape on the + inside the lid.  I then used this sensor daisy chained for two windows.  Did not set/register the internal switch only the two external ones as a zone and it is working fine.  Perhaps there was something going on with the internal switch! 

[Brian H]

Could be.
Let us know of any other developments.