A common problem is for one station to remain on while the system goes thru its cycle. Almost invariably this is due to the solenoid on that station being faulty and being stuck open.
It is usually not a problem with the control box.
Depending on what type of solenoid you have it is most likely going to be a faulty diaphragm. Usually it is best just to replace the entire solenoid and be sure that all will work well for a few years to come.
If you wish to try and replace the diaphragm then remove the top half of the solenoid (you may be able to screw it off if it is a ‘jar top’ or you may need a screwdriver to remove screws) locate the diaphragm – it is a piece of rubber and then take it to your local retic store and ask for a replacement.
You will pay around $15.00 for a new diaphragm. Then simply refit it as you removed it (but don’t forget the spring)
When it comes to replacing solenoids I have a range of charges:
a) If it is exposed and dug out with no complicated pipework to add to the time of the repair then the cost would be close to $120.00 inc GST for a new solenoid.
b) If the solenoid is easy to locate but requires digging up then $130.00
c) If you have no idea where the solenoids are then its $120.00 plus the cost of the time it takes to locate the solenoid in question. Generally speaking using either common sense or an electronic tracking device a solenoid can be located in around 30 minutes.
For help with any of these issues call Andrew on 0400044236 or email email@example.com