Question about Bosch Water Heaters

1 Answer

How to light the Bosch TF250 pilot light

;ighting the pilot light

Posted by Anonymous on

Ad

1 Answer

Joseph Haga

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that gotĀ 5 achievements.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

  • Contributor
  • 50 Answers

I believe this is a hydro-sparker pilot ignition then burner on when T-Couple/Flame Sensor acknowledges pilot lit.
W/O the signal feedback the Gas Valve will not open and light burner.
This is a Technician Service Job as you have insufficient knowledge to DIY this potentially dangerous LP/NG Control Valve/Sparker Assembly
I assume that lack of knowledge by your lack of a Manual for the Unit
You cannot force ignition on a hydro-sparker manually.

Posted on Sep 12, 2014

Ad

2 Related Answers

rockitman187

Randy Hough

  • 2559 Answers

SOURCE: Bosch TF250 hot water service

Replace the flame sensor.

Posted on May 11, 2009

Ad

Anonymous

SOURCE: Replaced thermocouple on Bosch TF250.

Before calling service technician, open follow links for troubleshooting resources.
Bosch site does not show TF250, but shows 250SX and 250SXO.
Gas Products Technical Support: 800-642-3111
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/tabid/370/Default.aspx

At no time when visiting tankless website have I read suggestion that people fix tankless as a do-it-yourself project. In fact each site says repeatedly to call service technician for installation and repairs.
When reading service bulletins, the repair protocols are generally long and very sequential, even if a thermocouple seems straightforward there are many interrelated parts and sensors that must communicate exactly with each other.
Example: following pdf outlines operation sequence for non-standing pilot model
http://waterheatertimer.org/pdf/Tankless-gas-operation-overview.pdf

The dirty water also suggest that tankless has not gotten regular maintenance that is required for continued operation. Tankless are not install-it-and-run-flawless-for-years type of machine.
Read manual for specific maintenance required for your model. For example yearly flushing the heat exchanger with vinegar to avoid lime build-up is suggest most models. Tankless are succeptible to lime build-up.
All costs are energy. Maintenance alone can easily eat up the promised $1-8 monthly savings from tankless vrs tank-type water heater. One service call can wipe away years of expected savings, plus replacement part can sometimes cost as much as whole new tank-type water heater, installed.

Posted on Apr 17, 2011

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I light pI lot and it stays lit burners light and reach temp but then burners wont relight to keep temp unless I tap gas valve..is it my gas valve


A lot of pilot lights have a thermal coupler... the pilot light must be lit for several min to open the coupler so the pilot light will not go out.... the newer systems use an electronic ignition and no pilot light and need power to autostart but the coupler may be gone if you are holding that pilot start button down for several min and the pilot light is still going out..ps.. leave it in pilot mode for several min after initial start up before turning turning full burner operation operation operation operation operation operation operation it will snuff out the pilot light.

May 18, 2016 | Water Heaters

2 Answers

Wher is pilot light


Why will my pilot light on the gas water heater not stay lit for ...

diy.stackexchange.com/questions/.../why-will-my-pilot-light-on-the-gas-...
Jul 28, 2011 - The pilot light went out on my gas water heater. I followed the ... This could be from a valve not being all the way open. It could also be from a ...

How To Relight Your Pilot Light On Your Water Heater ...

? 7:54
https://www.youtube.com/watch?v=gqM7kMkkFAI
Apr 15, 2013 - Uploaded by TipsNNTricks
How To Relight Your Pilot Light On Your Water Heater. TipsNNTricks .... I answer the following questions in this video. How can I relight my pilot ...

How to Light a Water Heater (with Pictures) - wikiHow

www.wikihow.com/Light-a-Water-Heater

wikiHowJump to Questions and Answers - If the pilot light doesn't relight or goes out immediately after ... if you are unable to light the water heater after several attempts.

Jan 13, 2016 | Water Heaters

1 Answer

Pilot l.ight will not stay lit


The pilot light jet may have got a little bit of dirt or grit in it which is preventing it from keeping alight. Try probing the jet with a fine piece of wire to see it the blockage can be dislodged. You may have to unscrew the jet to clear it by blowing air through it. Make sure gas is turned off first before removing any parts.

The pilot light also has a thermocouple that allows gas to the pilot light while the flame is burning. If flame goes out it shuts gas off to the pilot jet. The thermocouple is bypassed by a switch during the initial ignition and once the thermocouple warms up after a minute or two of holding in the bypass switch, it should maintain the pilot. If, after cleaning, the pilot light keeps going out, it would seem that your thermocouple is faulty and needs to be replaced

Oct 20, 2010 | Whirlpool Water Heaters

1 Answer

The water heater pilot does not stay on?


The pilot light on hot water heaters is controlled by a thermocouple, a small copper rod that usually sits in or very close to the pilot light flame. When they go bad, which is not unusual, they do not allow the gas line to stay open and feed the pilot light. The easiest thing for you to do would be to replace the thermocouple. When following the pilot light lighting instructions, be sure to hold the valve button down for 30-45 seconds in order for the pilot light to heat the thermocouple prior to turning on the gas burner.

Sep 11, 2010 | Reliance Water Heaters

1 Answer

Pilot liht wont stay lit on hot water heater.


You will need a new thermo coupler to keeep the pilot ight on. It is a probe that touches the pilot flame to sense the the regulator to feed the gas flow. Upon failing it shuts off the gas to the regulator so the unit does not catch on fire. In other words it is a fail safe part that is required

Apr 12, 2010 | Water Heaters

1 Answer

M# 640HORT4 s# H07A090378---MY Pilot Light wont


Hi,
First thing is to replace the thermoscouple. When you light it you get it a bit hotter then normal. You turn on the main burner which keeps it hot. Then when it goes back to just pilot the flame is not hot enough to hold the pilot valve in.
Replace the thermocouple and you will be fine...

heatman101

Mar 26, 2010 | Water Heaters

1 Answer

After heating pilot goes out . my igniter is bad so i light manually and after heating main burner shuts off and so does pilot


The thermocouple that controls the gas to the pilot light must be bad. The thermocouple, when it is heated by the pilot light keeps a valve open that keeps gas flowing to the the pilot light. This thermocouple closes the valve that supplies gas to the pilot light, this is to prevent gas from continuing to escape when the pilot light goes out. This is a safety issue, I recommend that you call a professional about this problem. You might be able to repair it your self by replacing the thermocouple but I still recommend that you have it checked by a professional.

Dec 02, 2009 | Whirlpool Water Heaters

Not finding what you are looking for?
Water Heaters Logo

Related Topics:

558 people viewed this question

Ask a Question

Usually answered in minutes!

Top Bosch Water Heaters Experts

Sheldon Dedek

Level 3 Expert

912 Answers

Muntejaya Ginting
Muntejaya Ginting

Level 3 Expert

10422 Answers

john h

Level 3 Expert

23504 Answers

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

Answer questions

Manuals & User Guides

Loading...