Question about Bosch AquaStar 2400ES-LP

1 Answer

Makes low rumble noise when 2 or more faucets running hot water. New installation. Inlet vent: 3 feet with 3 Ls. Outlet vent 3 ft with 1 L. Gas: 3/4" all the way(no flex).

Posted by on

  • 36069 May 11, 2010

    Do you have an expansion tank installed anywhere on the cold water supply? If so, how old is it? If not, this very likely will solve the problem.

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 18 Answers

CALL BOSCH TECH SUPPORT, THE NUMBER IS BEHIND THE COVER, THERE ARE A SERIES OF DIP SWITCHES FOR THIS WATER HEATER THAT HAVE TO BE SET ACCORDING TO YOUR ELEVATION, VENT LENGTH, AND USAGE. THIS IS FIVE MINUTE FIX.

Posted on Dec 29, 2009

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

Recently installed a Noritz NRCP 112 water heater, but very frequently it keeps shutting off and on the display it says error 60, after looking at the manual there is no explanation of what error 60 is....


Shut downs with new heater might be defective PC board.
Other issues could be associated with improper installation.
Low gas pressure caused by undersized gas meter or water in the gas line, undersized gas line to unit (requires 1" gas line to within 10 feet and then 3/4"), wrong type of gas line (cannot use flexible gas line), improper vent (for example too long horizontal run or undersized vent pipe or shared vent with furnace or other gas appliance), not enough incoming fresh air supply, nearby exhaust fans or vent fans stopping proper draft on tankless, temperature set too high for cold incoming water supply (install tempering tank to help preheat water),..
http://waterheatertimer.org/Tempering-tank.html

Other causes can be clogged water filter located where cold water enters tankless, or clogged water line, or crossover caused by bad single-handled faucet or bad crossover valve on recirculation system, improperly sized recirculation system. These problems can mean less water flow through tankless, so burner shuts down, and unit throws error code because sensor indicates water flow is still moving but inadequate to trigger burner
http://waterheatertimer.org/Crossover.html
http://waterheatertimer.org/Water-heater-recirculation-system.html


Gene
Water Heater Timers Save Money

Nov 27, 2014 | Water Heaters

1 Answer

Water Heater Rumbling When Running Cold Water In Faucet


Check and see if the cold water has been plumbed to the 'c' on the heater, the hot to the 'h', and the relief valve somewhere else, usually on the side. Maybe the plumber cheated somewhere to make installation easy.

Nov 29, 2013 | Rheem Water Heaters

1 Answer

Pump not working-delay in hot water delivery.In the past,a vibration occurred when cold water running above the pump.Can this be repaired.Power operating to pump. Thanks, mel ross


Question not 100% clear.

1) The pump is not working? Does the pump make a noise? if pump is not working full-time, it can cause delay in arrival.
If pump motor is suspect, and outlet has power, then check override switch located on timer. Set override to Timer, move some of the trippers outward, then manually rotate timer dial until pump turns ON.
http://waterheatertimer.org/images/IMG_9325-grundfos-timer-800.jpg
If no noise is detected, or noise stops and starts, or seems strained, or if pump is hot, then pump motor may have burned out.

2) If pump is working, and makes noise like a humming sound, and pump motor is not hot, but hot water is not circulating, then unplug pump so it will not overheat and burn up.
Disassemble the pump and cross-over piece. Clean piping with white vinegar or CLR. Do not soak in CLR or it will damage seals. Rinse parts thoroughly. Reassemble and see if problem is resolved.
If pump is vibrating, then suspects include sediment and/or air inside line, and this can be resolved by cleaning as described. Also install air vent to increase life of pump.

3) Other causes for hot water delay at faucet are crossover.
Crossover can be caused by bad single-handled faucet cartridge, and/or by clogged-or-failed check valve on cross-over piece on grundfos.
This type of problem lets cold water enter hot line, and causes delay in arrival of hot water. Clean-or-replace the grundfos cross-over piece, and replace bad faucet cartridge.
Open following link for testing instructions:
http://waterheatertimer.org/Crossover.html

Resources:
http://waterheatertimer.org/Water-heater-recirculation-system.html
http://waterheatertimer.org/pdf/Troubleshoot-recirculation.pdf

Add a comment for more help.

Take a moment and rate answer for accuracy:
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.

Sep 17, 2011 | Laing Thermotech Autocirc Undersink...

1 Answer

Heater takes more than 1 minute to get water to kit faucet , then temp fluctuates


1) Guesses: Sounds like a bad single-handled faucet cartridge, or low water flow at faucet, or clogged water filter.
Replace faucet cartridge, clean the aerator, and/or clean sediment out of pipes below sink, and clean water filter at tankless unit each month.

2) For exact measure of problem:
Typical faucet can have 2 gallon per minute flow rate.
2 gpm flow rate means faucet fills 1 gallon container in 30 seconds. Test faucet using 1 gallon container and a cooking timer to get flow rate.
Clean aerator to improve flow rate. Compare kitchen flow rate with other faucets in home.
http://waterheatertimer.org/Low-hot-water-pressure.html

Most homes have 1/2" diameter pipe running to kitchen faucet.
100 feet of 1/2" diameter pipe holds 1.2 gallons of water. This assumes no sediment build-up inside pipes.
http://waterheatertimer.org/Water-heater-recirculation-system.html

Assuming only hot is turned on: If faucet is 100 feet away from water heater, and pipe diameter is unobstructed 1/2" diameter, and faucet has 2 gallon per minute water flow, then hot water should arrive in 36 seconds.
50 feet away, and hot water should arrive in 18 seconds.

If kitchen has single handled faucet, and the handle is raised in the middle, then equal amounts of hot and cold water are drawn at same time. This doubles amount of time for hot water to arrive.

If single handle faucet has a bad cartridge, then faucet can have crossover.
Crossover means that cold water can enter the faucet even if faucet is turned to hot.
Bad single-handled faucet cartridge can delay or stop the arrival of hot water.
http://waterheatertimer.org/Crossover.html

Tankless require maintenance including cleaning combustion parts yearly, de-lime heat exchanger frequently, and clean water filter each month.
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf
http://waterheatertimer.org/pdf/Bosch_Overcoming_fluctuating_temps.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Add a comment for more help.

Take a moment and rate answer for accuracy:
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.

Sep 15, 2011 | Rheem Direct Vent Natural Gas Tankless...

1 Answer

Water takes 30 sec to cover 10m from heater to tap


body { background: #FFFFFF; margin: 0px; padding: 4px; font-family: arial, verdana, sans-serif; font-size: 10pt; } p { margin:0px; padding:0px; } .spwrap { background: transparent url(/wysiwyg_rte/misspell.gif) repeat-x scroll center bottom; } You are talking about length of time to get hot water from water heater.What diameter pipe are you talking about? What type of faucet do you have?
1/2" pipe has inside diameter of .54" and holds 1.2 gallons per 100 feet
10 meters is 32 feet and holds .4 gallons
Average faucet puts out 2 gallons per minute, so 30 seconds you should get 1 gallon of water.
Put a bucket under faucet and check amount of water flow.

Assuming you draw just hot water from the faucet, then 30 seconds is slow for receiving hot water.
If you have single-handle faucet and raise handle straight up in middle, then you are drawing half hot and half cold, so it would take 30 seconds for hot to arrive.

If hot water is slow, the problem might be crossover.
http://waterheatertimer.org/Crossover.html
or low water pressure due to clog in water line
http://waterheatertimer.org/Low-hot-water-pressure.html
Other problems could include clogged water filter, clogged water softener, defective pressure valve, and low water pressure.

Sources:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
http://waterheatertimer.org/Water-heater-recirculation-system.html

Jul 10, 2011 | Bosch Outdoor Gas Tankless Water Heater...

1 Answer

Hi i have a power vent water heater model #-6g40pvw-40f. It go's into lock down mowed one light lit on vaction two more on A-and B is it the heating element or lighter mechanison thank you mike from...


Hello Mike,
Check gas pressure, burner parts need to be cleaned, check electrical outlet, hot surface igniter is bad

White Rodgers intellivent error code:
http://waterheatertimer.org/How-to-adjust-water-heater-temperature.html#Intellivent
http://waterheatertimer.org/pdf/Intelli-vent-gas-valve2.pdf

Error code says: system in lockout, but you know that.
1) Low gas pressure, no gas to water heater: call gas company to check pressure
2) Hot surface igniter not positioned correctly: inspect and clean burner parts.
http://waterheatertimer.org/images/Reliance-hot-surface-ignite.jpg
3) Low voltage to water heater/ outlet has wrong polarity: Use circuit analyzer on electrical outlet to make sure polarity is correct

Typical power vent manual:
http://waterheatertimer.org/pdf/Reliance-40-50-power-vent.pdf
Cleaning water heater:
http://waterheatertimer.org/How-to-install-gas-water-heater.html#clean
http://waterheatertimer.org/pdf/How-to-clean-combustion-chamber.pdf

Jun 19, 2011 | Audiovox Richmond 6G40-36F 6-Year Tall Gas...

1 Answer

Our rheem pronto tankless rutg-74xp red light will come home indicating hot water and stay on about 2 minutes and then turns off we have turned off and back on and let water run for 5 minutes and will come...


Before calling service technician, open following link for Rheem troubleshooting resources.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

List of causes MIGHT include one of following:
Bad household circuit breaker that powers electronics, or loose wire inside outlet where tankless plugs in.
Tankless fuses and control board.
Water flow rate too low. Minimum .8 gallon required (depending on model)
Tankless inlet filter clogged.
Household aerators clogged at faucets.
Crossover at single-handled faucet
If installed, there can be crossover at mixing valve.
Faulty household check valve, including check valve on re-circulation system if that system is installed.
Restriction in household water line, such as clog at elbow.
Unequal pressure in household hot and cold lines, caused by restriction in hot line. When single-handled faucet turns on, the cold water pressure is higher so hot does not flow and tankless will not turn on.
Loose wire connection inside tankless.
Unit temperature set too high.
Unit temperature set too low.
Water temperature is very hot coming out of tap, so more cold is added, but that reduces amount of hot water flow, so tankless turns off because flow rate is too low.
On some tankless, if water is preheated by solar or other indirect source, the burner will not activate.
High mineral content in water > delime tankless yearly
Misaligned temperature sensor
Low gas pressure. Wrong type of gas. Undersized gas line.
Too many faucets on at same time.
Faulty tankless water valve. Water valve stuck.
Fluctuating household water pressure, for example MUD and PUD district water pressure problems or water well pressure.
Faulty household pressure reducing/regulating valve if installed.
Faulty household pressure tank, if installed -or- pressure tank needs to be installed.

Apr 24, 2011 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

1 Answer

Boiler Venting.


There cannot be controlled venting of the flue , the products of combustion must have free flow to escape , The heat exchanger is above the burner which heats the water if you thinks this is high then maybe you a pressure problem . Or contact the makes tech line and ask them what they think the consumption might be for you heater .You may find this on google

Mar 22, 2017 | RTO W4 A.O Smith Gas Hot Water Heater...

1 Answer

Size and installation for instant water heater


Ariston gl4.0 should be fine if used inline with your hot water heater. Used alone it will likely run out when dishwasher is filling and you are using sink.To use your existing hot water for backup: 1 connect existing HOT water line to cold (inlet) on ariston, 2 Then HOT (outlet) from ariston to sink and dw. If you want instant hot water at a sink 10 feet away: use 3/8 pex pipe from ariston to sink, so you only have to run off a cupful or 2 before hot water arrives at sink.

Aug 30, 2009 | RTO Ariston Gl4.0 Instantaneous Electronic...

1 Answer

Water Heater Replacement


1) After shutting off the water and gas or power supply to the tank, connect a hose to the drain valve at the bottom of the tank, open the valve, and run it to a nearby drain or outdoors. Use two wrenches to unscrew the inlet and outlet fittings from the top of the tank. 2) For a gas water heater, shut off the gas inlet valve and use two wrenches to disconnect the union or flare fitting between the gas supply pipe and the inlet valve. Also remove the flue hat that expels gasses into the flue at the top of the tank. 3) After removing the old unit, set the new one in place with the controls and burner accessible. Allow at least 6 inches of clearance around its perimeter, and keep it away from flammable materials. Use a level to check it for plumb; shim the base with pieces of asphalt shingles or plastic wedges. 4) Wrap the threads of the heat trap fittings with pipe-wrap tape, and screw the fittings into the water heater (blue into the cold water inlet and red into the hotwater outlet). Be sure the arrows marked on the fittings point in the direction of water flow. 5) Install new flexible connectors on the water inlet and outlet pipes. If there is no shutoff valve on the cold water side, install one before connecting the water heater. After all connections are complete, open the shutoff valve to fill the tank. While it is filling, open several hot water faucets in the house to bleed off air in the pipes. 6) Assemble the gas pipes as shown. Spread pipe dope on the threads, and screw together the parts, tightening them with one pipe wrench on the pipe and another on the fitting. Follow the manufacturer's instructions for connecting the unit with gas supply tubing. After turning on the gas, test all connections by brushing soapy water on them and watching for bubbles.

Aug 27, 2008 | Stiebel Eltron Tankless Water Heater

Not finding what you are looking for?
Bosch AquaStar 2400ES-LP  Logo

Related Topics:

173 people viewed this question

Ask a Question

Usually answered in minutes!

Top Bosch Water Heaters Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Donni Steen

Level 3 Expert

659 Answers

john h

Level 3 Expert

12104 Answers

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

Answer questions

Manuals & User Guides

Loading...