DIRECT IGNITION PROBLEM SHOULD BE SIMPLE!

[texas t]

Just wondering about the accuracy of the digital over a fluid manometer?

[stay gold jonny]

DO NOT STICK THE MANOMETER IN YOUR BUTTHOLE

The much needed comic relief on this post! Almost spit out my drink when I read that!

[alcomech]

A cheap manometer cost less than fifty dollars. If you work on any equipment which works on natural gas, propane, etc. than you must use some sort of gauge to measure both main gas pressure and manifold pressure. This is not a luxury item nor should it be on your wish list of tools. The bottom line is that if you are servicing this type of equipment, you MUST have some form of tool to measure pressure. If not pack up your tools and work only on equipment your are familiar with. Other peoples lives depend on it.

I remember around 15 years ago when there was this job at a church which had 6 gas package units on the roof with over 300 ft of gas pipe. Every thing was fine in a part load condition but when it got cold the heat would lock out to just a few units at a time and on any given day different units would lock out.

Well the previous tech changed some parts that were suspect but nothing worked. Weeks went by and finally and at first glance after looking at the 2" gas line which appeared undersized thought this could be the problem. It was determined that only on a full load there was not enough gas pressure to supply all the units at the same time. One or two would lock out at the rest ran just fine.

With a simple gauge it was determined that there was only 2" W.C. Only enough for first stage.

How about the furnace which was over firing and cracked the fire box and caused a flame roll out, and burned all the controls.

Or the wall furnace over fired and ruptured the fire box.... you get the idea.

[hkempf]

Mr bill can you tell me why you wouldn't clean a flame sensor with sand paper, I have always seen it done that way and the school I went to did the same, just curious, always wanting to do things the right way, and I've never heard of using a dollar bill, that's interesting

[Joehvac25]

Mr bill can you tell me why you wouldn't clean a flame sensor with sand paper, I have always seen it done that way and the school I went to did the same, just curious, always wanting to do things the right way, and I've never heard of using a dollar bill, that's interesting

The sand will melt into glass and cause poor signal.

[beenthere]

Mr bill can you tell me why you wouldn't clean a flame sensor with sand paper, I have always seen it done that way and the school I went to did the same, just curious, always wanting to do things the right way, and I've never heard of using a dollar bill, that's interesting

Scars the surface of the sensor and causes it to corrode quicker.

Use steel wool or a 3M pad. I use a dollar bill mostly.

[Joehvac25]

Scars the surface of the sensor and causes it to corrode quicker.

Use steel wool or a 3M pad. I use a dollar bill mostly.

Makes sense, I've heard the glass story, ever hear that?

[hkempf]

That makes sense, it's not actual sandpaper I've been using but a sanding cloth, but I will switch just to be safe, thank you for the advice , I'm always wanting to do things the right way

[Youngwiseman]

thank you to the 1 person who help me,i been understood there are alot of negative energy on hvac talk but i ignore it .so i got the burner back but still goes out how do i test the flame sensor rod cleaned it ,its still shut off gas valve after a couple sec

[Youngwiseman]

what is the best way to test the flame sensor to understand that it really needs replacing

[2sac]

With your meter.
The comment you made in the other thread about negative energy is uncalled for. I'm curious why you came back for advice if we are such horrible people.

[Youngwiseman]

With your meter.
The comment you made in the other thread about negative energy is uncalled for. I'm curious why you came back for advice if we are such horrible people.

lol obviously you maybe the negative energy im speaking of but if you are not why speak on it .i didnt here for drama ,i come to surround myself with individual who think like me and learn new things that i will face in the field

[Youngwiseman]

ok...my meter huh ....ohm,amps,volts,? during the heating after burners lit ,i put my clamp on meter on it and read like 0.3 give or take 2 amps is this right