The mixing valve is on the back of the water heater and mine has a red knob.
Atwood water heater mixing valve problems.
There is still a check valve on the lower cold side so back flow to the fw tank.
I checked my atwood heater manual and also nothing mentioned on the mixing valve.
Problem seems to be solved.
10 gallon water heater xt exothermal mixing valve for xt water heater atwood xt water heaters advanced water heater system featuring exothermal technology the atwood xt 10 gallon water heater provides the equivalence of a 16 gallon unit without increasing the space required.
Drain the water heater by removing the drain plug then refill the heater.
That s the tamper proof part of it.
If it is not too old hen you can try cleaning the orifice and see how it goes.
Saves weight while fitting in the same cut out.
Recommended cleaning procedure is to soak the mixing valve in hot vinegar to dissolve any hard water deposits blocking the screens.
This gives you more hot water than the capacity of the tank alone but adds to the complexity and maintenance issues as you see.
Impurities in the water can cause your atwood water heater to malfunction.
Atwood has tried to make the valve tamper proof.
This can happen if you have a weak gas control magnet or if the thermocouple needs to be replaced.
The problem is that the water heater thermostat is calibrated to make scalding hot water then the mix valve cuts that down to a more reasonable temperature for use.
Yes can soak it in clr or hot white vinegar to clean and then rinse thoroughly.
Fired the heater up and with the new valve the water temperature at the tap is 130.
I will be cleaning out the water heater more often now.
Atwood 6 gallon water heater unit is pre set at temperature 140 degree fahrenheit which is adjustable from 110 to 150 degree fahrenheit.
Ok so when you turn the valve and antifreeze fills the tank here is the fix.
Tamper proofing glued allen head screw the knob to adjust output temp is pain to remove.
For poor pilot flame you would need to replace the orifice.
Sometimes you need to move adjustment back forth to clear.
It took about 15 minutes of flushing my water heater before it ran clean with no chunks of crud coming out.
One of the most common problems with atwood rv water heater is a pilot outage.
Check the water heater s vent and air grill for.
Which is why its discussed in this airsteam forum and just about every other rv forum.
