Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Control is not working?
Document: working fine and fit and product are holding up well after 20 days of use. nothing like a cool room and warm sheets to fall asleep easily . delivery was fast. would use them again
I keep it on the bed from beginning in November or December until the end of February. I take it off the mattress after the winter season also. So basically this can not last a full calender year. I also remember winter 2011 my husband complained out the heat output was not the same. He had to increase it to 5 for it to be at a noticeable level for him. I didn't think anything of it because my side was working fine.
This would have been season three of using this, but it has quit working. I guess I should be lucky that it lasted 2 seasons. The two blankets I purchased in the past didn't even make it an entire season.This mattress pad was great season one. Last year, one side quit working completely. Now, this year it doesn't work at all. Plugged it in and both controllers flash F2.
It works, but the L temp is far too high. I like the fact there is only one place to have to plug a dual control in, however, the controller on the left side will NOT lie flat, and the flat wire was so twisted that after this time, I still cannot get it straightened enough to keep the controller on the nightstand.
I used to go to bed with socks, PJ bottoms, t-shirt and long sleeve top just to stay warm. Now I am back to my comfortable underwear and t-shirt.The only thing I did not like was the control pad did not sit on my night stand the way I wanted it to because the wires tended to pull it towards the edge.
I had always been an electric blanket user in the past but had never enjoyed the luxury of warm sheets on a cold night that I do now. The other comments that I have read suggesting turning the control to a higher setting initially and then turning it down upon getting into bed is right on as it has worked well with me. I have not heard any sounds whatsoever coming from the mattress pad nor do I feel any of the heating wires that were mentioned in some of the comments.
and nothing. For the price, this thing should work for several years.
Wow, just what I needed for a cold New England Winter. I purchased the King Size  mattress pad and it comes with the dual controls. It fit on my mattress perfectly. I was worried I would be able to feel the coils, but you cannot feel them. Heating the bed from the mattress is better than heating it with an electric blanket. It's like a heated car seat, nice. When I go to bed, I put it on #10 and it quickly heats the bed.
Worked well for a few months then my precious bed warming mattress cover started breaking down. I really love the warmth when it works, but unfortunately due to poor quality, I had to throw it out.
We have yet to turn the pad on any higher than low. That is enough to warm the bed for when you get in and enough to prevent the loss of body heat during the night. I am very happy.
Answer: I have noticed from time to time the plug get loose at the foot of the mattress pad. That causes the controlsto flash or not work all together. Unplug the connection and re-connect firmly. I hope this works for you.