Question about Bosch GL4 Ariston 4-Gallon Point-of-Use Indoor Electric Mini-Tank Water Heater

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How do i install a Bosch GL4 Ariston 4-Gallon Point-of-Use Indoor Electric Mini-Tank Water Heater?

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  • Bosch Master
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Bosch GL4 is plug-in style electric water heater
Copy following for product manual, and for step-by-step illustrations.
http://waterheatertimer.org/How-to-install-under-counter-water-heater.html

Posted on Oct 30, 2012

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Posted on Jan 02, 2017

gary1121
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SOURCE: How do you drain the Ariston GL4

is there a pet **** on the bottom under a plastic cap? you might have to take the cover off and I would recomend putting some boiler drains in the line for future draining,, all units of water heaters have drains and looking at the picture I see something sticking down on the bottom see if thats not the drain

Posted on Jun 11, 2009

  • 5 Answers

SOURCE: What is the difference between Bosch GL4 Ariston

The difference between the Bosch GL4 and GL4Ti is the GL4Ti has a glass lined tank with titanium inside and an 8 year warranty. The GL4 has a glass lined stainless steel tank and a 6 year warranty.

Posted on Jan 14, 2011

SOURCE: My Ariston 4 gallon water

1) Dirty water implies degraded metal inside unit:
The anode rod protects metal parts. Once anode is depleted, metal parts react with water.

2) Open following troubleshoot pdf showing Ariston parts
http://waterheatertimer.org/pdf/How-to-Troubleshoot-Bosch-Ariston-Water-Heater.pdf

3) Ariston manual: Read manual cover to cover, make sure water heater receives yearly maintenance as outline in manual.
http://waterheatertimer.org/pdf/Bosch-GL_English.pdf

4) Information on anode rods
http://waterheatertimer.org/Replace-anode-rod.html

5) For Bosch gas and electric tankless: Open following link for troubleshooting resources, including Bosch contact information, typical manuals, error codes, tech support, parts, fuel-saver calculator, service bulletins, water heater forum, fixya links, disclaimers, and links for finding service technician.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

6) Add a comment with your experience so others with same-similar problem can benefit.

Also 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 Apr 02, 2011

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1 Answer

No hot water at all. Have tried resetting, but still nothing. Is it the heating element what needs to be replaced?


Get a multimeter and check power first. If you have power going into the water heater, proceded to replaced the heating element. The replacement can only be done by empting the tank and turning the brakers off. Good Luck!

Jan 13, 2014 | Bosch Ariston GL4 GL4 Point-of-Use...

1 Answer

Water leaking through the power cord hole


Buy new water heater.
The tank is rusted out.
http://waterheatertimer.org/How-to-install-under-counter-water-heater.html

Jul 13, 2012 | Bosch Ariston GL4 GL4 Point-of-Use...

1 Answer

Ariston GL6+ Occasional rusty water. Can this be remedied? Thank you Ed


Ariston GL6 6-gallon electric water heater has anode rod to prevent steel tank from rusting.
Once anode rod depletes, the tank rusts.
All tank-type water heaters have replaceable anode rod that can stop rusting, but will not repair damaged tank.
Open following links for resources + manual with parts number and illustration on page 7 and 10. Part number is shown as 570241 anode rod.
http://waterheatertimer.org/pdf/Bosch-GL_English.pdf
http://waterheatertimer.org/Replace-anode-rod.html

Jul 12, 2011 | Bosch Ariston GL6-plus GL6+ Point-of-Use...

1 Answer

Bubbling water at pressure releaf valve on top of valve. valve is rusted. rusty water in pan. Unit was installed new two years ago. Offer suggestions. Thanks


Rusted water usually means anode rod depleted and tank is rusting. Change 570241 anode rod every year or so.
Boiling water could mean bad thermostat causing run-away heating so water is released out of TP valve. Replace 994062 thermostat for 4 gallon.
Leaking water at TP valve could mean bad TP valve: replace TP valve with generic valve from hardware store.
Open link for diagram, parts and replacement information
http://waterheatertimer.org/pdf/Bosch-GL_English.pdf

Jun 14, 2011 | Bosch Ariston GL4 GL4 Point-of-Use...

1 Answer

My Ariston 4 gallon water heater is given out hot dirty water?... Any Suggestions?


1) Dirty water implies degraded metal inside unit:
The anode rod protects metal parts. Once anode is depleted, metal parts react with water.

2) Open following troubleshoot pdf showing Ariston parts
http://waterheatertimer.org/pdf/How-to-Troubleshoot-Bosch-Ariston-Water-Heater.pdf

3) Ariston manual: Read manual cover to cover, make sure water heater receives yearly maintenance as outline in manual.
http://waterheatertimer.org/pdf/Bosch-GL_English.pdf

4) Information on anode rods
http://waterheatertimer.org/Replace-anode-rod.html

5) For Bosch gas and electric tankless: Open following link for troubleshooting resources, including Bosch contact information, typical manuals, error codes, tech support, parts, fuel-saver calculator, service bulletins, water heater forum, fixya links, disclaimers, and links for finding service technician.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

6) Add a comment with your experience so others with same-similar problem can benefit.

Also 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.

Apr 02, 2011 | Bosch Ariston GL4 GL4 Point-of-Use...

1 Answer

Installed an ARISTON point of use hot water heater. Water is warm when faucet is first turned on turn just barely warm after a minute. Is there a way to adjust this heater, I misplaced the manual that came...


After installation check the water temperature. If adjustment is necessary, remove front

cover to adjust thermostat. Clockwise to increase the temperature and

counter clockwise to decrease it.


To reach the thermostat:

1. Pry off the round cover plate from its right hand edge with

a small flat-head screwdriver.
2. Remove the Phillips screw revealed beneath the round cover plate.

3. The cover can now be removed by pulling out its left-hand edge.

When reassembling, work in the opposite way being careful to insert the tongue
of the cover into the slot.

Jun 04, 2010 | Bosch Ariston GL4 GL4 Point-of-Use...

1 Answer

What is the difference between Bosch GL4 Ariston and Bosch GL4Ti Pro Ariston?


The difference between the Bosch GL4 and GL4Ti is the GL4Ti has a glass lined tank with titanium inside and an 8 year warranty. The GL4 has a glass lined stainless steel tank and a 6 year warranty.

Sep 02, 2009 | Bosch GL4Ti Ariston Pro Ti Electric...

1 Answer

How do you drain the Ariston GL4


is there a pet **** on the bottom under a plastic cap? you might have to take the cover off and I would recomend putting some boiler drains in the line for future draining,, all units of water heaters have drains and looking at the picture I see something sticking down on the bottom see if thats not the drain

Jun 09, 2009 | Bosch Ariston GL4 GL4 Point-of-Use...

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