I have Lennox G61MPV that has an error on start up, a 2 + 3 red LED code which is for a low pressure switch failing to open. I checked the hoses and then blew and sucked to move the switch. I hear it open and close. I started the furnace again to see if that got the switch working again. Still the same error. I had a failed low fire pressure switch a couple years ago so I tested that one first my connecting an ohm meter to it when the inducer motor starts and it goes from infinity to a very low resistance so it looks like that one opens. Then I did the same on the high fire pressure switch and it never goes from infinity to a very low resistance. It looks like this is the bad one.

Water pressure is determined by how high of a water column the water has to travel to supply heat to the highest radiator. 12-15 lbs is good for a single story home with a basement. 15-18 is bare minimum for a 2 story house with basement. 18-22 would be appropriate for a 3 story house. The general rule of thumb for figuring out the required pressure is to measure or estimate the water column hight and multiply it by 0.45 to get a general idea of the required pressure for the system.


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Objectives:  The purpose of this study was to assess the validity of using a pulsatile, pressure waveform transduced from the epidural space through an epidural needle or catheter to confirm correct placement for maximal analgesia and to compare 3 different types of catheters' ability to transduce a waveform.

Conclusions:  The technique of transducing the pressure waveform from the epidural needle inserted in the epidural space is a sensitive and reliable alternative to other techniques for confirmation of correct epidural catheter placement. The technique is simple, sensitive, and inexpensive and uses equipment available in any operating room.

According to study findings, for management of an acute hypertensive response in patients with intracerebral hemorrhage, intensive blood pressure treatment produces lower rates of __________ compared to standard blood pressure treatment. e24fc04721

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