Laing autocirc not running

Following link has general troubleshooting:
http://waterheatertimer.org/pdf/Troubleshoot-recirculation.pdf

If I had to guess... debris is blocking the rotor.
Disassemble connections and see if you can flush pump.
Gene


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http://waterheatertimer.org/Water-heater-recirculation-system.html#laing

Gene

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Crossover valve went bad
There is no replacement part
http://waterheatertimer.org/Water-heater-recirculation-system.html

Gene

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Question posted under autocirc recirculating system.
Unknown if system has been taken apart and cleaned with white vinegar, or if faucets are single-handled.
Open following links to help isolate possible problems.
http://waterheatertimer.org/Water-heater-recirculation-system.html
http://waterheatertimer.org/Crossover.html

Autocirc can be uninstalled and the pipe cleaned out with CLR (calcium lime and rust), otherwise there are no repair parts.
Once the motor begins to slow, it overheats and burns out.
11 years is a good run, so you must have good water or are careful about your water softener.

http://waterheatertimer.org/Water-heater-recirculation-system.html
Using the timer and running Autocirc 1 hour a day costs between $11 and $17 per year to operate.
2 hours a day is $22-34 per year.
This includes pump operation and additional time that water heater operates.

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For a price, expert speaks with you over phone while you work on circulation system or any do-it-yourself project.
Fixya is always less expensive than a service call.

If you have the same Autocirc product I have, then it cannot be taken apart. The timer seems to be connected and sealed together with the pump. If yours is different, answer back with the wires that you can see and we'll see if the timer can be by-passed.
http://waterheatertimer.org/Water-heater-recirculation-system.html

With the ordinary Grunfos-type pump that is not on a timer, you can add a switch and have the pump work on demand as you describe.

And they make a product that does the specific job you describe. It's called a Demand Pump. Link above shows two different types at page bottom.

I have not tested either Demand Pump shown. They operate on-demand ... when you activate the pump, the pump quickly brings water over from the hot water heater.

So the Demand Pump has a higher volume pump than the Autocirc or Grunfos.

I question a two things about the Demand Pump. 1) How will the increased pump pressure affect local pipes, especially supply tubes under a sink. 2) How HOT does the pump get? If pump gets hot, and it is located under bathroom sink next to paper goods, then that is a hazard. Some regional building codes don't allow ceiling light bulbs in closets because the bulbs get hot and start fires when people pack their closets full.

Open following link for Re-circulation information and resources:
http://waterheatertimer.org/Water-heater-recirculation-system.html

If the unit is getting hot, it may have already slowed and is now spiraling to it end.
Try bleeding air out of water lines, and clean autocirc with CLR calcium lime and rust remover.
Recirculation systems have a built in check valve so cold water side of faucet will work correctly. If this check valve is stuck open or closed, it can affect a lot of things in the plumbing system.
For example, stuck check valve can cause tankless water heater not to operate. It can also cause autocirc pump to overheat.
Lines, or elbows clogged with sediment can also cause same problems with recirculation system. If your system has direct return line to water heater that connects into the water heater drain port, then clog in line can cause overheated pump. Check water flow, check water lines, and clean out autocirc.

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Open following link for Re-circulation information and resources, including diagram of installation and operation:
http://waterheatertimer.org/Water-heater-recirculation-system.html

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on autocirc or any do-it-yourself project.
Fixya is always less expensive than a service call.

replace the cartridge