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This is a standard irrigation system control box used for residential homes. It can manage a maximum of six valves.

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Dripper Controller not working in cold weather

My Rain Bird ESP-6TM works fine when its hot outside but does NOT work at all when it is cold. If I use a blow dryer to put some heat on it, it turns on within 1 minute

Any suggestions?????

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Solución elegida

Hi @creekchub ,

Heat expands, cold contracts.

It may be that there is a dry joint connection somewhere on the circuit board or to the circuit board from the input supply voltage connection.

When you heat it up the metals expand and make the connection, when it is cold the metal contracts and the connection is open circuit.

Is the controller display showing when it is cold?

If not then then I suggest you start looking where the power comes into the controller and follow the paths through.

Use a strong light and a magnifying glass to closely inspect the component and wiring connections on and to the control board.

Without a schematic (I can’t find one online) it will be a slow process.

Try heating only specific areas of the control board to see if you can at least narrow down the area where the problem may be.

You could try using a voltmeter to start checking where the 24VAC power comes in and then how far it gets into the circuit before it “disappears”. Trouble with this is that pressure from the meter’s test leads as you test various points may cause the connection to come good, so be aware that this may happen.

Here’s a link to the ifixit Rain Bird ESP-6TM Control Board Replacement guide, which may be of some help in gaining access to the motherboard.

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