Question about Bosch AquaStar 2400ES-NG
When i turn the water on, the heater starts clicking (assuming that is the auto ignition trying to come on??) but the burners don't light. the water pressure hasn't changed between the time when it was working and then wasn't . . .
On my bosh250 hot water won't turn on. Shows A2 code I hit restart several times then as long as the hot water is on it will stay hot but when the water cools down the A2 code is back. Help!
Posted on Dec 18, 2011
Model????? The 635Es, 250SX and 2400E are same. The 2400ES and 2700ES are World 2 heaters. Any error codes as I can't imagine this problem w/o codes. Flow initiated but you have spark. Is there any ignition? If so flame rod may be bad and not reporting ignition. Igniter sets on some early 2400/2700 have proved to be bad. Water pressure has zero to do with this. If you have an EC or EA code you have gas problems (meter, line size/length or gas valve). Also if 3005 or 3007 Software you can pull the last 5-10 error codes from Controller.
You need to call Bosch and get an RSA out there. This is a gas appliance that if you screw up can destroy your house. FYI any water in the gas valve condemns it. It will not dry out and work correctly. Is the fan running at ignition and/or purge? Any Controller errors require replacement. You have 2 years on parts warranty from installation date so don't screw around trying to DIY. Warranty Labor is not covered.
Flue obstruction? If you used the AQ3 installation Kit you have the wrong termination box to prevent freeze up and/or water penetration You need the Z-Vent drop nosed termination. Look for a fine tan dust in the fan intake (brown plastic) the intake throat or in passageway to the gas valve. Call Bosch unless you're a Gas Tech this is beyond you.
Posted on Mar 03, 2009
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.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 05, 2013 | Bosch AquaStar 2400ES-NG
Jun 26, 2011 | Bosch 125BO NG AquaStar Outdoor Natural...
May 31, 2011 | Bosch AQ125BO LP AquaStar 4.3 GPM Outdoor...
Apr 16, 2011 | Bosch AquaStar Indoor Natural Gas Tankless...
Mar 06, 2011 | Bosch & Tankless LP Hot Water Heater
Feb 08, 2011 | Bosch & Tankless LP Hot Water Heater
Dec 15, 2010 | Bosch 425HN NG Tankless Water Heater
Dec 15, 2010 | Water Heaters
Aug 06, 2010 | Bosch AquaStar 125FXKIT-LP 125FX Liquid...
460 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: