[encantotom]

CM-2B-35F/WLAU35 NASON are the front pressure sensor on mine. they are for low pressure. if you unplug them it just tells the hwh system that there is at least 35lbs of air in the system.

there are two in front, both the same. all they do is tell the hwh system when there is less than 35lbs in the system and supposedly turn off the green travel light on the hwh panel.

the one is the back is like a 90 or 100 and does a similar thing only to make sure you have enough pressure in the system to float the bags. if it is unplugged it just assumes that you have enough air.

if you asked newell about them they would just tell you to take them out and plug them.

i did that for the rear one for about 5 years and then finally got on and put it in.

the last time i rebuilt my front 6 pack, one of the wires broke off one of the front ones so i got two new ones and put them in.

again, as long as you watch your air pressure, it wont hurt anything to plug them.

i think i had to order them and have them made and it took about 6 weeks or so to get them. i would for sure not pay a premium price to get them early or faster or such.

my two cents worth

tom