The valve on mine is not stuck, but we have been suspecting it's operation might be less than stellar.

today I put the heat gun on it to heat up the spring, and the spring moved. It un-wound at the end and removed itself away from the mounting pin. the counter weight did not move at all.

I thought the spring might be on backwards, but it's on there just like the pictures.

Something is not right but I don't know what.

So, at rest, cold, should the weight be up? or down? Does the spring hold it into position cold, then moves it hot?

more confused than ever now...