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How
to replace thermostat on gas water heater Buy Gas water heater thermostats at Amazon |
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This
Honeywell gas thermostat is NOT removed from
tank ... instructions
on separate page How to replace atmospheric Honeywell gas
water heater
thermostat This
Honeywell gas water heater
thermostat can be removed from tank and steps
shown on this page:
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This
Honeywell gas thermostat is NOT removed from
tank ... instructions
on separate page
How to replace Honeywell gas
water heater
thermostat This
Honeywell gas water heater
thermostat can be removed from tank and steps
shown on this page:
Range 90°, Hot is 120°
F // Very Hot 156°, ECO limit 199°
FResource .pdf: How to replace power vent water heater gas valve 1 How to replace power vent gas control thermostat 2 Also read instructions below on this page ____________________________________ How to light water heater / pdf Bradford White power vent service manual/ pdf Error codes and service manuals Buy Example Honeywell gas control valve at Amazon |
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Intellivent
gas water heater
thermostat IS removed from tank, and steps shown on this page
Intellivent gas water heater thermostat can be RESET Resource: Read about resetting intellivent How to light water heater Intellivent error codes and service manuals Also read instructions below on this page Buy Buy Intellivent gas control at Amazon White Rodgers/ Rheem Intellivent gas control AO Smith intellivent |
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Mechanical gas valves are removed
from tank, and steps shown on this page Thermostat is located inside copper tube To replace thermostat, gas control valve must be replaced Service manuals for all types gas control valves Buy Gas water heater thermostats at Amazon |
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| Thermostats
are usually single-use after ECO trips Water heater Gas thermostat has Energy Cut Off  When
ECO senses overheating inside tank, the ECO trips and shuts off
gas.If water heater burner or pilot has gas, then ECO is not tripped. Gas valve must be replaced (except Intellivent which can be reset). ECO must have continuity Resource: Read more Test ECO on Robertshaw- White Rodgers Read about resetting intellivent Buy Gas water heater thermostats at Amazon |
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| Replacement starts here for all models | ||||||
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Before
spending money on repairs, check anode rod Anode will stop tank from rusting. If anode rod is depleted, then install new anode to prevent steel tank from rusting. Anode is located on top of tank, either regular 1-1/16” hex head located on top of heater in separate anode port, or combo anode that is connected to hot water nipple. Or both is water heater has 2 anodes. Resources: Read more about replacing anode rod Leaking water heater Buy: Anode rods at Amazon 1-1/16" impact socket at Amazon Breaker bar at Amazon Adapter from 3/8: socket to 1/2" socket |
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Identify
and order new gas thermostat using label on
side Order new gas control valve thermostat online If gas control is discontinued, there are usually replacements available. Do not re-use old thermostats Do not install different model on water heater Do not mix propane or natural gas Do not convert water heater to different gas. Propane burns hotter and requires cast iron burner, and propane gas has more pressure> absolute danger to convert to different gas Buy Gas water heater thermostats at Amazon |
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 Turning off the gas:Set the gas control valve/thermostat to its lowest setting. Turn gas control knob to “OFF” position. use shut off on gas line to turn off gas to water heater. Locate gas shut off. Handle will be parallel with gas line when gas is ON. Rotate gas shut off handle perpendicular across line to shut gas OFF. |
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 | Turn off water and drain tank Let water heater cool for a couple hours. Release water pressure by opening a nearby hot water faucet, let run until water is cool to touch. Turn off water supply to the water heater. | |||||
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Remove
gas line from side of gas control
Keep gas connections clean/ avoid debris inside gas valve Gas line is re-used. Use only black pipe or flexible yellow gas line. Make sure gas line stays clean, so dirt will not enter new gas control. |
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  Keep pipe clean |
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Larger image Connections
on bottom of gas controlNote tubes connected on bottom of gas control. For propane, threads are reverse. Natural gas, threads are regular. Note how tight each is when removing, so re-installation is about same. The thermocouple or thermopile will be connected hand tight plus 1/4 turn. Overtightening when re-installing can cause failure. These connections do not need pipe sealant or teflon tape. Remove the ECO wires, Thermocouple, Manifold tube and Pilot tube | ||||||
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Use
1/2" galvanized pipe as handle Screw piece of galvanized pipe into gas control valve and use as handle to unscrew old gas control. Loosen gas control using weight of water inside tank, then drain tank before removing completely. |
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Use
weight of water in tank to loosen gas valve
... then Drain tank Turn off water and drain tank completely If tank won't drain, connect washing machine hose and water hose to drain valve to flush open. |
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Install
new thermostat New gas control should have sealant on threads. If not, add 6 wraps white teflon tape to threads. Install new gas control into tank. Must be tight so pressurized hot water doesn’t leak from tank. |
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 Larger image |
Re-attach
tubes under gas control To prevent cross threading, the manifold tube should be started by hand (turn clockwise for natural gas, counter-clockwise for L.P.) Do not overtighten. No teflon tape on tubes under gas control. Thermocouple is finger-tight plus ¼” Electronic gas controls have wires for thermopile and do not have thermocouple. |
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Re-attach
gas line
Using yellow teflon tape, or gas-approved thread sealant Yellow is for gas. Do not let pieces Teflon, or pipe sealant, into gas line where it can enter gas control. Do not overtighten gas line where it connects to gas control to avoid damage to new control. Gas has less pressure than water line. |
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 Larger image Gas
pressure is low, so it takes time before leak
will show.
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Use
soapy water to
check for leaks on gas line, and on tubes
under new
gas control. Test for gas leak a) Test pipes: Mix liquid soap with water and use brush to put around around gas line joints to see if there are bubbles. Use plenty of soapy water. May take some time for bubbles to appear since gas is under low pressure. Soap bubbles coming from joint indicate leak: retighten pipes, use teflon tape on yellow flex pipe and black pipe. Do not overtighten pipes or damage can occur to gas control valve. b) Test factory-installed connections located below gas control valve Manifold and pilot tube connections located under the gas control valve do NOT use teflon tape. See image of manifold and pilot tubes If either tube under gas control valve is leaking, just tighten a little bit. Do not overtighten. Manifold and pilot tube: look for reverse thread on LP water heater. Regular thread on NG water heater Remember: Natural gas and propane gas both have less pressure on the line than water pipes, so gas pipes are easy to seal with ordinary wrench. If you can install water line without leaking, you can do the same with gas line. Do not over-tighten connections. Gas odor will be present if gas line has leak. Smell close to floor since some gas can be heavier than air and will settle downward. If gas is present, leave house immediately and call gas company. Turn off main shut-off at gas meter. |
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 Bathtub running full stream before lighting water heater |
Tank
must be full of water before lighting 18) Fill tank completely with water until water is coming out of tub spout. Open tub spout on hot side and wait for full stream of water. Next open TP valve for a moment to bleed last of air from tank. Turn off tub spout and light heater. Tank cannot have any air when burner is turned on or damage can occur to tank. |
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 How to light typical gas water heater Read directions printed on side of your tank |
Light
new water heater as shown on label located front of water heater Read product manual for tips and advisories. Resource: How to light gas water heater by type of gas control valve Note: New gas heater might have small water leak when first fired up because of condensation Ignore a bit of water inside combustion area or bottom of tank. This water is condensation and will disappear as tank reaches set temperature. Any cold tank can show same condensation when fired up. Water pipes should not be leaking. Water should not be dripping down vent pipe: this signals bad venting or other vent problem. Don't worry excessively, but if needed, post questions on professional water heater forum: The Tank |
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| 16 things needed for gas water heater & .pdf resources | |
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What you need for
operation of gas water heater. General troubleshoot 1) Basic parts and operation 2) Adequate incoming air supply ... issues: closed doors, tightly insulated house, very hot attic. 3) Adequate air supply getting to burner... issues: dirty vent screen, dirty environment, maintenance. 4) Thermal cutoff ... TCO ... issues: failed part, maintenance, vent. 5) Flammable vapor lockout .... issues: exposure to vapors, bad FV sensor, failed FV system, 6) Fuel supply to gas valve thermostat ... natural gas and propane are different ... issues: wrong gas, low pressure, moisture in pipe, undersized gas meter, supply line too small for BTU rating. 7) Gas valve thermostat regulates fuel supply ... issues: not enough gas, failed thermostat, failed gas control valve. 8) Fuel supply from thermostat to burner ... issues: maintenance, thermocouple-thermopile, gas control valve. 9) Clean and replace burner ... issue: periodic maintenance requires burner inspection, cleaning, and possible replacement 10) Functioning thermopile-thermocouple-pilot light ... issues: misalignment, failure of part. 11) Ignition of fuel supply by pilot light or hot surface igniter ... issues: pilot light, piezo igniter, electrode. 12) Power vent water heater troubleshoot ... issues: pressure switch, blower, blower sequence from gas control, outlet polarity 13) Venting combustion byproduct .... issues: vent in disrepair, other vents in house drawing air 14) Misc troubleshoot manuals 15) How to install gas water heater 16) How to maintain water heater |
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