We have the above mentioned heater-natural gas model. This is the beginning of its second season and it has a pilot. Had it on today and was working. After we were done swimming DH went to turn it off and the top of the heater was ice cold. It had just stopped working. He checked and the pilot is on and now we can't get it to restart.It is a very windy day here. Could that be the problem? There are no troubleshooting tips in the owners manual. It just says if it won't light to turn off the gas and call for repair.
Would anyone have any tips to try before we have to call someone?

Thanks.