What does it mean when light from the water heater (brand is robertshaw) flashes?

Question

The light is usually stable and now its flashing. The hot water isnot working.

The brand is actually GSW and the light of the control thingy is blinking.

Answer 1

It might bet that the contacts on the thermostat need to be cleaned or changed, or that you need a new thermostat. If the thermostat is OK than it could be that you need a new heating element. Make sure you have the correct voltage coming into the heater.

Answer 2

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It seems you have two different problems. First is the hot water. It probably is just a bad thrmostat. These cane be bought at most home centers and appliance stores. I presume its a gas hot water heater since you mentioned a pilot light. Second, the leak. There are several reasons for a hot water heater leak. Most common is the relief valve is stuck partly open or is bad. Its a spring tension versus pressure device usually on top of the water heater. The next most common leak is a fitting. Over time the may corrode or weaken and cause a leak. The next is a crack or leak in the class liner of the tank itself. This requires the replacement of the water heater. If your not a real handyman/woman or your not familiar working with hot water and gas appliances, I suggest you call a professional. Saving a few dollars is not worth scalding yourself with hot water, flooding you house or (worst case scenerio) causing a gas leak and causing an explosion and fire.

Answer 3

Gsw Water Heater

Answer 4

What is the model number on the tank,, I need this to be sure these are the right codes,,,

LED Error Codes
Green – Indicates system status
Steady on: System OK.
Steady off: Board control fault or no power applied
1 flash: Ignition failure (control in one-hour lockout)
2 flashes: Pressure switch fault, fails open (switch stuck open)
3 flashes: Limit switch open (main or auxiliary)
4 flashes: Pressure switch fault, fails closed (switch stuck closed)
Yellow – Indicates flame status
Steady on: Normal flame is sensed.
1 flash/second: Slightly weak flame
4 flashes/second: Weak flame

there is a recall on some of gws water heaters,,

Technical Bulletin
Date: 2005-08-31


Robertshaw® R110 Series Gas Control Valve Notice


We have learned of a potential failure that could occur with certain Robertshaw® R110 series gas control valves installed on four models of GSW/John Wood 40-gallon natural gas water heaters. These valves may potentially result in gas leakage and should be replaced. Robertshaw® has advised that they have not received any reports on incidents of leaking gas or any reports of injuries.

Only 40-gallon natural gas water heaters manufactured in August, 2005 within the serial number range of 0508501169 to 0508522010 may be affected. The serial number is located on the water heater’s data label. If the serial number does not start with 0508 or is electric, oil, propane or any other size of natural gas water heater, the water heater is not affected.

The four potentially affected 40-gallon models are:

Brand Model Cat. No.
GSW G640S38FV-02 B4171

John Wood JW40S38FV-02 B4173
John Wood JW40S34(or36)FV-04 B4175
John Wood JW40S38FV-02 B4273


If the water heater is one of these four models within the serial number range of 0508501169 to 0508522010, the date code on the gas control valve must be checked. The suspect gas control valves are only those Robertshaw® R110 valves that are marked with one of the following date codes: 0531, 0532 or 0533. These date codes are clearly labeled on the side of the control valve behind the spark igniter. The date code can be viewed by following the instructions below.


Carefully pry off the friction-fitted spark igniter from the gas control valve using a flathead screwdriver to reveal the date code as shown in figure 1.
Read the label as shown in figures 2 and 3.
Record the date code and reinstall igniter.
Call GSW Technical Services @ 1-888-479-8324 only if the date code is 0531, 0532, or 0533, to arrange to have the gas control valve replaced. GSW Service Advisors are available 7 days a week 8:00 am – 8:00 pm. EST.

Should you require additional information or clarification you may call Robertshaw® toll-free at 1-800-322-7120, from 7:00 am to 7:00 pm CT Monday through Saturday or visit www.robertshaw.com to review a list of affected appliances and register for the recall.

The following is a link to the Recall Notice posted on the CPSC web site:

http://www.cpsc.gov/cpscpub/prerel/prhtml05/05274.html


ROBERTSHAW 7222WDER SEQUENCE OF OPERATION
When initially energized, the 7222WDER control will perform a self-diagnostic check and the red LED will momentarily flash 3-4 times.
On a call for heat, a check is made by the control to ensure that the air pressure switch on the blower is in the open position (if closed
the sequence pauses and the blower is not energized). With the air pressure switch proven open, the control energizes the blower
(Terminal 7). With the blower energized the control checks to ensure that the air pressure switch closes. At this point the air pressure
switch must close or the blower will run continuously. As the high limit switch on the blower is wired in series with the air pressure
switch, both switches must be closed (energizing Terminal 5) or the blower will run continuously. With proven airflow and the high limit
switch closed, a flame safety check is undertaken to ensure that a flame is not present prior to ignition. Providing a flame signal is not
detected, the hot surface igniter is energized and a warm up period of approximately 17 seconds is initiated. Following the igniter warm
up period, the control allows gas flow to the burner initiating a 4-second trial for ignition period. The control will normally establish a
flame and maintain the flame until the call for heat is satisfied. If a flame cannot be established, is extinguished, or the flame signal
drops below 0.7 microamps, the control will stop the flow of gas to the burner. The blower continues to be energized and a 30-second
interpurge is undertaken. The control will attempt for ignition again. If the control cannot establish ignition after three attempts, it will
lock-out. The red LED will flash continuously indicating a lock-out condition occurred. Unplugging the 120VAC-power supply to the
water heater then restoring power will reset the control.

Answer 5

Robertshaw is the type of gas valve not the brand of heater--if you remove the cover there is a sticker that will explain the flash codes

Answer 6

1

Answer 7

code 4 temperature exceededwhat a means how i fix

Answer 8

To be honest, I don't think so

Answer 9

listen to Bob, Dora!

Answer 10

thanks for the answers!