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Adjust thermostat on water heater
How to replace electric water heater thermostat
How to replace gas control thermostat
How to increase amount of hot water
Upper and lower thermostats
thermostat temperature range
Buy residential upper and lower thermostats
Thermostats are interchangeable/ each works with your water heater
Temperature range 90-150 Therm-o-disc/ reset trip @ 170
Temperature range 110-160 Aprom/ reset trip @ 180
Local YMCA hot tub = temperature 105/...  Typical shower-bath = 110F
Rated 120, 208, 277, 480 volt AC

Buy 90-150 degree F for residential tank:
Water heater thermostats at Amazon
Rheem thermostats
More thermostats
89T short/ dual-element thermostat
All therm-o-disc products

Therm-o-disc 59T-66T sell sheet/ pdf
Therm-o-disc thermostats
Difference between Rheem thermostats

Safety and inspection
Cautions: Use adequate lighting. 
Inspect for leak, rust.
Never touch wet water heater, or water that was wet.
For safety, turn off 30 Amp circuit breaker. Troubleshoot electric water heater

How to check if power is off

Average bath-shower temperature 104
Save 3-5% operating cost for adjusting 10 lower
coleman flashlight

Use Flat & phillips screwdrivers
+ Flashlight

How to test if electricity is OFF
Troubleshoot leaking water heater
water heater thermostats Electric thermostat

Remove covers (save screws)
Pull out insulation

<>Top thermostat is larger 

<>Bottom thermostat is smaller

Don't touch or move wires

 Insulation & cover must be put back when finished or thermostat will not read correct temp
water heater thermostats

Adjust temperature using screwdriver
How to replace thermostat
Therm-o-disc thermostats
Rated 120, 208, 277, 480 volt
90-150F range.
Test upper thermostatECO trip 170F +/-5F
Different models can have higher range, but numbers for temperature are different.

Use flat tip screwdriver to set upper and lower thermostats to 120 this temperature is good for most homes.

For more hot water, set upper thermostat 5-10 higher.

All water heater thermostat settings are approximate > test result at faucet with thermometer.

Ways to Increase amount of hot water
Wire thermostat
Troubleshoot thermostat
Replace thermostat

Water heater thermostats

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Aprom thermostat
Rated 120, 208, 277, 480 volt
110-150F range.
ECO trip 180F +/-5F
Different models can have different range, but letters for temperature are different.

If 120 leaves you short of hot water, the tank could have sediment build-up
How to clean sediment out water heater
How to flush water heater/ steps

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Aprom thermostat for small under-counter or point of use water heater. 

How to install point-of-use water heater

Burned thermostat Burned thermostat
Water heater thermostats
How to replace thermostats
Test thermostats
Wire water heater thermostats
Troubleshoot electric water heater
Water heater cover
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1) Make sure thermostats are covered with insulation, protector, and cover. See image
Without insulation, Thermostat exposed to room temperature will misread temperature and cause overheating.
2) Make sure thermostat sits flat against tank wall. Wiggle thermostat. Check that bracket is not rusted and loose.
electric water heater in basement Finish electric

Put covers on <> make sure insulation is put back or cool air will cause thermostat to misread temp <> put metal covers on <> pick up tools <> turn on circuit breaker

Inspect for water on floor or leaking pipes Troubleshoot leak
Whirlpool self diagnostic control      

Whirlpool and Craftmaster Energy Smart

Choose 4 different energy settings plus adjust temperature using selector.

Adjust thermostat from 80 to 150

   Do not turn off gas unless smell of gas is present

Cautions: Use adequate lighting. No candles, open flame or smoking. Inspect for leak, rust, soot, missing parts. If you smell gas, leave building, and call gas company. Minor gas leak, shut off gas to heater, and call gas company. Gassy smell but no gas leak, clean soot from flueway. How to clean flue   Troubleshoot gas water heater
coleman flashlightBuy
Flashlights at Amazon
Headlamps at Amazon
Safety Equipment for Professionals
Thermostat probe or sensor is immersed in water inside tank.
Water temperature around the thermostat probe can drop 15-25 before main burner is activated.

Thermostat probe is same-similar for all types of gas water heater control valves.

The temperature sensor (copper tube) contains two things: "the ECO (energy cut off), and a temperature probe thermistor.
Thermistors are thermally (heat) sensitive variable resistors. A change in water temperature changes the resistance (measured in ohms) of the thermistor. The gas Gas control valve thermostatcontrol valve interprets change in resistance as a change in temperature and uses information to activate and deactivate call for heat."

 ECO (energy cut off) will trip if water inside residential tank exceeds 180-188F high limit. This will cause thermostat to shut off gas to burner.

 ECO is typically single-use and gas control must be replaced. The new electronic gas control, such as Intellivent control valve used on some power vent models, and the Honeywell electronic gas control valves are resettable after overheat event. Models vary, and reset is not possible for every condition.

Calibrate Gas control valve:
Calibration on Gas valve is approximate by 5-8F.
If calibration is far off, then rotate dial so temp at faucet is good.

If temperatures fluctuate, then plumbing is first suspect. Check temperature of water at TP valve and at water heater drain valve. Check for stacking or crossover

If plumbing checks out, gas control might be bad.
If temperatures inside tank drop too low before water heater turns ON, then gas valve is bad.

How water heater thermostat work
Basic parts and operation of gas water heater
Honeywell atmospheric vent gas control
Icon gas valve

Range 55-160, ECO trip at 180

Reliance/ Honeywell gas control
American / Honeywell gas control
Kenmore water heater gas valve
Craftmaster/ Whirlpool
Bradford White
AO Smith
Honeywell at Amazon
Troubleshoot Honeywell gas control valve
Honeywell power vent gas control
Honeywell gas valve

Range 90-160, ECO trip at 188

Example Honeywell gas control valve at Amazon
Reliance NG at Amazon
Troubleshoot Honeywell gas control valve
Troubleshoot power vent water heater
White Rodgers Intellivent power vent gas control

Range 80-150, Error flashes if water temperature reaches 160 TCO trip at 188 ECO trip at 188
Rheem gas control
AO Smith intellivent
Intellivent gas control valve
Troubleshoot Intellivent gas control valve
Troubleshoot power vent water heater
water heater thermostat

Robert Shaw Unitrol Mechanical gas control valve thermostat

Troubleshoot Robert Shaw gas control
Robert Shaw models
Robert Shaw troubleshooting/ pdf
General troubleshoot/ pdf
General troubleshoot manual /pdf
How to light water heater/pdf
Magnet testing
Test thermocouple
Gas valve testing
Recalibrate gas control/ pdf
How to light gas water heater
How to replace water heater gas valve
Gas water heater thermostats at Amazon
gas valve setting
White Rodgers gas control valve thermostat
Line up with small triangle located at 1 PM position.

Troubleshoot White Rodgers gas control
Service manual
Service manual 2
Service manual 3
How to light water heater/pdf
General troubleshoot manual /pdf
White Rodgers gas control valve replacement pdf
Power vent water heater issues
Magnet testing
Test thermocouple
Gas valve testing
How to light gas water heater
White Rodgers NG replace, install, set temp
How to replace water heater gas valve
Gas water heater thermostats at Amazon
Rheem gas control valve at Amazon
White Rogers thermostat

White Rodgers Power Vent thermostat

Rotate dial until mark on dial lines up with temperature

Troubleshoot White Rodgers gas control
Troubleshooting/ pdf

How to light gas water heater
How to replace water heater gas valve
Remove gas valve
How to replace gas control thermostat
How to replace gas control
Replace gas control
Operation and safety
How to replace Honeywell gas control
Buy universal gas control wrench
Or make a wrench out of plywood
Honeywell Smart Valve AO Smith
Honeywell Smart Valve
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Temperature settings and features
Smart valve error codes
Smart Valve service manual
Robert shaw gas control valve
Robert Shaw 120Volt input gas control valve
Wiper Control and Gas Valve assembly
Triangle pointed upward is 120 degrees F
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Error Codes and troubleshoot
Guardian power vent Robert Shaw error code
Rheem parts list
American power flex parts
General manual with lighting instructions
Replace water heater gas control and FV
Check pressure switch, blower, gas control
Sequence of operation
How to light water heater
Replacement/ Buy
Rheem wiper SP20123A thermostat KIT
Wiper SP20123B valve/ no thermostat
To reset: turn the red control knob on and off 6 times within 30 seconds to reset the board.

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Adjust temperature rheem tankless
How to set Rheem tankless temperature 2012
Bosch ariston thermostat
Bosch Ariston under-counter water heater thermostat
How to install and wire under counter water heater
Ariston manual with part numbers
Geo spring control panel
GE Geo Spring hybrid manual
Review GE heat pump water heater

Kenmore with power anode rod
How to light Effex water heater
Review Kenmore

Whirlpool energy smart electric/ Smart Grid

How to install gas water heater

Troubleshoot electric water heater

Troubleshoot gas water heater

How to troubleshoot electric water heater
How to replace element and clean out tank
How to remove rusted element
Water heater will not drain
How to wire Tork DTU40
How to wire Intermatic GM40
Intermatic GM series
Intermatic EH10 and WH21
Intermatic EH40 and WH40
Intermatic T-101 T103 T104
Sylvania timers
Pool timers and manuals
Intermatic T104P201

GE box timers
Wire GE 15207 timer
Intermatic ET series
Intermatic ET104C
Pool timers and manuals
Tork pool timers and manuals
Intermatic T104P201
Troubleshoot Intermatic
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How to install gas water heater
How to install electric water heater
Troubleshoot gas water heater
Troubleshoot electric water heater
Point of use water heaters
Troubleshoot Gas valves with manuals
Icon gas valve

How to replace water heater element Waste King disposal
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Install point of use water heater
Titan tankless

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Type 1 and type 2 surge protection surge protection
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box timers Resource:
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Control water heater w/ Z-wave
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