satellite dishes are sensitive to how good the initial installation is. make sure there has been no shuttle shifting attachment to roof, pole etc. also screws that hold dish at correct angle have to stay tight.
i have had an LNB (plastic "eyes" that look at dish), get water in them. they become very sensitive to weather.
and with any electronic, sometimes they just glitch.
2 weekends ago the last lap of the nascar race the electricity in the neighborhood went out. talk about pissed?!
As an installer, I agree with all of this. When I'm dithering (aiming) a high def system, if I'm off by 1/32 of an inch in my installation, I'm off by roughly 700 miles at the satellite. Quality installation is a factor but there's not a technician on the planet that can compensate for your house shifting/settling over time. If you're experiencing satellite issues that you didn't have before, contact your provider and set up a service call. Over 70% of the service calls that I roll to are issues with the dish alignment. To be safe, though, make sure your technician checks all your connections and replaces any that have been compromised by water/weather damage. It may seem like a PITA but, if you must, follow him/her around and make sure they are actually checking those connections rather than just aligning your dish and hitting the road. I have customers do this often and it doesn't bother me a bit. When I have a customer like that, I actually explain to them what I'm doing and why. I also show them certain things that they can check themselves in order to possibly avoid a service call in the future. Here's a hint, also. Tip your technician and he'll take care of you for life! There's two things a technician never forgets: A house that he's done work at and a customer who tips. It doesn't have to be much (heck, enough to buy lunch will carry you a long way with your tech). I've been tipped everything from a dollar (it was every cent the guy had is his pocket) to $200.00 on a job (that one was an absolute nightmare). As techs we can't give out personal telephone numbers out but we also can't keep you from saving our numbers on your phone. I let customers (who tip) know that. I might even recite the last 4 digits of my number to them to help them "remember" which number is mine. As long as I don't have to burn a serialized piece of equipment, I can usually help them out at the end of my work day off the clock. And, for a customer who tips, I'll do it every time.