SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

Swap the two modules and see.

Good deals and you're welcome.
There's one thing I can't remember if the old modules work in the new controllers or or the new modules work in the old controllers. I think the old modules work in the newer controllers cause I've done that a few times.
I'm not sure if the new modules will work in the older Pro-C. You may want to ask them or buy an old style on Ebay.

New one's are black. Old one's are grey.

Quoted from "mrfixit"

.........I'm not sure if the new modules will work in the older Pro-C..........

New modules are backwards-compatible. There was a counterfeit Pro-C that appeared when the old grey modules were in use. Altering the design of the Pro-C kept counterfeit modules from being used in current-production Hunter controllers.

Quoted from "Wet_Boots"

Quoted from "mrfixit"

.........I'm not sure if the new modules will work in the older Pro-C..........

New modules are backwards-compatible. There was a counterfeit Pro-C that appeared when the old grey modules were in use. Altering the design of the Pro-C kept counterfeit modules from being used in current-production Hunter controllers.

Then I must have put new modules in the old controllers. Getting hard to remember. Been quite a few years since I did that. I still have some old modules. I'll give it a try one of these days on a new controller.
I have one of those knock offs too. Irrigation Direct.

I found this thread very helpful: Solenoid Making Clicking noise ,as it was my exact problem. I was going to reply there, but I couldn't, because "Attention: The last reply to this post was 1160 days ago. The thread may already be out of date. Please consider creating a new thread."

After swapping modules, I thought I had a controller problem, since stations were "disappearing", but even this was a symptom of the bad PCM-300 module. Here's my full story:

My solenoids (Station 7 & 8 )were "clicking", and the valves were not opening, so I swapped the last two PCM-300 modules with each other. The problem went away and all seemed to be working well.

I am using only using Station 12 on the third PCM-300.

Since I know I have some kind of a problem, either with the third module, or the third slot, I ordered another module. It's a good thing I did, as I noticed station 12 was not coming on anymore. I also noticed that when I tried to run 12 manually, that stations 10, 11 and 12 "disappeared " from the controller (a Hunter Proc C). If I pulled the 3rd module out, and put it back in, 10/11/12 were back, but would later disappear again. Station 12 is used for a water feature, so being without is no big deal, short term.

New module arrived, and it, and the system, are working fine.

So I just wanted to say thank you and I hope my experience may help others.

Sincerely, Eric

PS. I do have a valve on station 9, but do not use it all the time. Only manually when needed.

Edit: Well this post did add to the old thread. Obviously I don't know this board very well.