Question about Laing Thermotech Autocirc Undersink Instant Hot Water Circulating System

1 Answer

I have the AutoCirc fixed thermostat model, and I installed it last fall as part of my bathroom remodel. It worked great for a couple months, but now it does not seem to be functioning at all. I have changed the timer settings, unplugged and re-plugged it, tested the power at the socket, and turned the switch to constant On, and nothing seems to work. Is there something internally in the pump that can be cleaned/fixed/replaced easily or checked?

Posted by on

1 Answer

If pump does not turn on when set to ON, then it sounds like pump has gone bad or timer has gone bad.
http://waterheatertimer.org/Water-heater-recirculation-system.html

If pump runs but hot water does not show up, then you might have crossover problem:
http://waterheatertimer.org/Crossover.html

Recirculation systems cannot be exposed to hard water, or pump parts clog.

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

Posted on May 27, 2011

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

No hot water from kitchen tap


The hot side of the faucet is most likely plugged with something that came up thru the water system. The average thankless waterheater requires at least 1/2 to 3/4 gpm flow rate for the unit to sense flow and turn on. If there is not enough flow it will not fire and heat the water. Not sure about this particular unit but a few require at least one full gallon per minute flow. So chances are that if you fix the faucet, you fix the hot water issue at the same time

Jan 09, 2014 | Rinnai Water Heaters

1 Answer

Tankless water heater doesn't produce hot water in the winter when tempetures are below 32 degrees. I tried a water saver shower head and this worked for a little while. Anything else I can do ?


1) Tempering tank might help:
http://waterheatertimer.org/Tempering-tank.html

2) Reduce temperature setting on tankless unit so there is less differential between incoming cold water and thermostat set point.

3) Absolutely any tankless problem can be solved same day by installing tank-type gas water heater:
http://waterheatertimer.org/How-to-install-gas-water-heater.html

4) Add comment and say what you do to solve problem.

Jan 31, 2013 | Bosch AquaStar 2400ES-NG

1 Answer

Getting really hot water to the kitchen but only tepid hot water into the bathroom and ensuite. Do not need to put on the cold tap at all in the bathrooms but you can't hold your hand under the tap in...


If some taps have really hot and others luke warm, then you might have defective mixing valve, check valve, or crossover on single handled faucet.
http://waterheatertimer.org/Crossover.html

Crossover can also cause stacking event. Stacking could be part of puzzle.
http://waterheatertimer.org/Stacking.html

Once crossover or check valve or mixing valve problem is solved, if you have really hot water to some taps, then turn down thermostat to avoid scalding.
http://waterheatertimer.org/How-to-adjust-temperature-on-water-heater.html

Add a comment for more help.

Jun 13, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

For some reason, after 5 years, a small leak has developed where the hot water exits the autocirc2 tank when you turn the hot water on. I removed the fixture where the plastic tubing hooks on and the only...


It's true, nobody has 100% perfect answer for broken stuff.
Open following link for some autocirc resources:
http://waterheatertimer.org/Water-heater-recirculation-system.html

If I understand correctly, you removed supply line that connects autocirc pump to the hot water shut off valve.
Buy standard sink supply line at local box store or plumbing supply.
If memory serves, the supply line is 1/2" IP thread that connects to pump and 3/8" Compression fitting that connects to shut off.
You might try using thick-bodied white teflon joint compound to help seal the connection.
I use rectoseal on threaded connections and tubular drain connections to ensure forever seal:
http://waterheatertimer.org/images/rectoseal-006-400.jpg

If brass part of pump is cracked, then autocir may be bad.
I have no idea how to permanently fix a broken brass water fitting, and would suggest replacement at that point.

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

May 22, 2011 | Laing Thermotech Autocirc Undersink...

1 Answer

Recirculation pump goes on even when not timed by timer i.e, it's one during times not set by the timer. My thermostat on my hot water heater is set to "warm" not "hot". So the pump...


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

On a new Autocirc, you can choose between 'Timed' operation or 'Thermostatic' operation using the slide switch located below timer dial.
For Thermostat operation, slide switch to ON.
For Timed operation slide switch to Timer.

This solution assumes system is functional, and the check valve and internal wiring are working. Autocirc is a quality product.

Add a comment with outcome so others with same problem will benefit.

Absolutely feel obligated to upvote the free help.
Or take advantage of fixya paid help.
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.

May 03, 2011 | Laing Thermotech Autocirc Undersink...

1 Answer

I have installed a new adjustable thermostat unit (E1-BCANRT1W). Temp is set at 91 deg and I am using the timer. Two time periods are set and the switch is set to timer (not ON). The unit comes on at...


Double check your slide switch.
For timer: set switch to TIMER
For thermostat: set switch to ON
If slide switch does not operate, then Autocirc may be defective

Laing (800) 554-6853
http://waterheatertimer.org/pdf/Laing-E1-E3-E10-install-instructions.pdf
http://waterheatertimer.org/pdf/Auto-circ-manual.pdf
http://waterheatertimer.org/Water-heater-recirculation-system.html

1) Household AC wiring will not affect the timer.
You can check your outlet using cheap circuit analyzer from home center.
The clock rotates one direction and the pins push small lever down which turns motor on-off.
When the OFF pins pass, the small lever snaps back and the motor turns ON.

I cannot immediately find operation manual for the E-1 model.
Typical ACT303 auto circ manual says following:

2) If timer controlled operation is desired, set timer and move slide switch to TIMER:
Manual says: tabs/pins are outward for ON times.
Another sentence says UPWARD, so I don't know which way the pins are set for sure.
So if you want timer ON for 2 hours, you would set 4 consecutive pins outward or upward.
ON for 6 hours, set 12 consecutive pins outward or upward.
If the timer turns ON in reverse of instructions, then set the pins that way.
Autocirc does not make the timer, they buy timer modules from clock-makers like Grasslin, Intermatic, etc.

3) To operate Autocir thermostatically without the timer, slide switch to ON position.
The clock dial will continue rotating

Apr 14, 2011 | Laing Thermotech Autocirc Undersink...

1 Answer

I have a Lang Autocirc with timer for 11 years. The past few months water not getting hot I timed how long hot water takes in faucet before \unit by 6' and faucet just after unit and times the same over 2...


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.

Add a comment for more free help.
Also take advantage of fixya phone service.
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.

Jan 18, 2011 | Laing Thermotech Autocirc Undersink...

2 Answers

Where can I get the wiring diagram for the Laing Autocirc? I want to wire in a momentary switch so that when I am ready to get in the shower I hit the switch and the pump runs until the water is warm and...


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.

Oct 23, 2010 | Laing Thermotech Autocirc Undersink...

1 Answer

I have a laing cirulating pump thats is worhing but now making noise so i took it apart see nothing but it was hot when running so is there any thing i can do to fix before it burns out


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.

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.


Oct 22, 2010 | Laing Thermotech Autocirc Undersink...

1 Answer

NEED DIAGRAM ON INSTALLING UNDER SINK INSTANT HOT WATER CIRCULATING SYSTEM?


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.

Sep 15, 2010 | Laing Thermotech Autocirc Undersink...

Not finding what you are looking for?
Laing Thermotech Autocirc Undersink Instant Hot Water Circulating System Logo

203 people viewed this question

Ask a Question

Usually answered in minutes!

Top Laing Thermotech Water Heaters Experts

Donni Steen

Level 3 Expert

659 Answers

Brad Brown

Level 3 Expert

15557 Answers

Gil Shultz

Level 3 Expert

3368 Answers

Are you a Laing Thermotech Water Heater Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...