Hi,
We have a PDC Spa, actually at one of our rental cabins, and several months ago, the 3 little dots started flashing. I called PDC spas and they asked me several questions, if water was flowing properly and yes it is, all the jets have pressure coming out of them. We thought the heater was working properly at the time, so they suggested replacing the pressure switch, which my husband did, PDC Spas sent it to us. And we are still getting the 3 little dots flashing. It usually starts about 20-30 minutes after turning the temperature up. In fact this weekend we have guests in there, and yesterday we set it to 95, when they arrived several hours later they said it was only up to 88. Today he called to say cannot get it to go over 88 and he had the temp set at 102. We had them pull the breaker and set it up to 102 and he called back to say it was working and temp was up to 90. I think though after about 30 minutes them might start flashing again. And then maybe the temp will start to drop. Do you think we need a new heater or what else could it be? It is a 2 speed, 1 pump and no blower. 36 X 2 HP. Any help would be appreciated.
Thanks,
Linda