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Date Posted |
Forum
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RE: Question about Furnace Short Cycling..

Thanks guys for the great explanations.
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groundhogy
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05/20/22 08:08pm |
Tech Issues
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RE: Question about Furnace Short Cycling..

GOOD EXPLANATION
When I purchased the furnace a couple years ago, the factory lady sent me another sail switch which had a bigger paddle. I bet thats why.
I plan to pull it apart now that we are not using the furnace and give that fan a good cleaning.
I noticed if my voltage goes down just a bit, I get the short cycling.
Maybe they should regulate the fan voltage down to say, 10 vdc and use a 10 volt fan. Might fix the problem. But that would cost more. lol
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groundhogy
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05/20/22 02:42pm |
Tech Issues
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Question about Furnace Short Cycling..

In a previous post, someone mentioned that if your battery voltage is low, you will get short cycling.
Short Cycling: (as i understand it) where the flame cuts off and back on during one heating cycle. fan continues to stay on the whole time of the heat cycle until the thermostat decided temp is high enough.
Question
What is the mechanism by which a lower battery voltage affects the flame of the burner?
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groundhogy
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05/20/22 12:56pm |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

THink this proves the gauge and wiring is good.
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groundhogy
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05/02/22 03:45pm |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

So the one has 5vdc.
THe other is ground and measures about 10 ohms from it to something on the block.
When I ground and open the +5v line the gauge reads zero hot to pegged hot (grounded).
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groundhogy
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05/02/22 03:45pm |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

Measured 5vdc at the two wires
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groundhogy
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05/01/22 03:44pm |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

I didn’t try measuring that since it is a 2 wire situation.
Ground matters in this situation?
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groundhogy
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05/01/22 03:43pm |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

SW5130 is the motorcraft part number listed for both 7.3 and 6.0
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groundhogy
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04/30/22 11:26am |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

So in 2003, it was the last year gor the 7.3L. They changed over to the 6.0L that year.
I just went on Rock auto and looked at the 6.0 trmp sender... looks mechanically the same to my eyes..
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groundhogy
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04/30/22 11:18am |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

This is what I measured from the sensor and the connector terminals
-4.4 kohm at 60F
-5vdc on connector
-gauge 1/3 at 60F
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groundhogy
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04/30/22 11:15am |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

I will put a multi meter on both sensor and wires tomorrow probably.
Also someone mentioned looking up the proper sensor ohms range.
It is a 2 wire affair.
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groundhogy
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04/29/22 02:11pm |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

BurbMan... you are already fully buttered. And my mom always told me it's a sin to waste butter.
But you beat me to it. That's the first thing I thought of when I saw the Radio Shack reference.
I watched it more carefully this morning.
At first key turn, with engine cold... the gauge was at 1/4 hot.
Then in about 5-7 minutes, it drifts up to full hot.
Then the red light comes on telling you to look at your gauges, something is wrong.
Then at some point un-noticed, the needle is back to full cold.
If this happens every day the same way, then how can this be a chaffed wiring issue?
Also, the temperature circuit worked fine when the old sender was good (granted it's been broke for about 6 months though).
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groundhogy
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04/29/22 11:41am |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

Cant be chaffed wiring cuz it worked before.
But i was thinking possibly the contacts in the connector weren’t touching properly, but i am now doubting that.
I took a sewing pin and tried scratching/cleaning contacts and attempted to bend contact plates so as to touch male pins better. No difference.
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groundhogy
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04/29/22 12:23am |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

What about this theory.
Wrong part.
Same mechanical dimensions.
But more sensitive thermistor?
(Im assuming its some type of resistor inside)
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groundhogy
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04/29/22 12:19am |
Tech Issues
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RE: Temperature sender/sensor... 7.3L

Thanks BurbMan.
You are wonderful.
And very insightful.
And full of ... intelligence...
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groundhogy
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04/29/22 12:11am |
Tech Issues
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Temperature sender/sensor... 7.3L

Hi All,
I think RV'ers tend to have a diverse knowledge of things.
Now that you're buttered. lol
My temperature sender/sensor is doing odd things.
It was just replaced (and I don't wish to contact them again.).
It is either all the way hot, or all the way cold. Occasionally I've seen it in the middle.
This morning I watched it carefully, as it was in the rare middle position. Within a few minutes I saw it rise to all the way hot. Pegged.
Then during the day it will switch to all the way cold.
Anyone ever heard of this happening?
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groundhogy
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04/28/22 05:33pm |
Tech Issues
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RE: Water hose stuck on side of trailer..

I actually did try 3in1 first to no avail
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groundhogy
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04/24/22 03:46pm |
Tech Issues
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RE: Water hose stuck on side of trailer..

PLAN B:
Well, the vinegar soak did NOTHING.
Its probably fused together due to the hose end they sold me not being brass (gold colored over aluminum?)
Someone posted- well just torque it as hard as you can. It will either loosten up, or it will break. If it breaks, it needed replacement anyway.
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groundhogy
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04/23/22 03:44pm |
Tech Issues
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RE: Need help finding an interior wall outlet...

Well how do you get a box behind the wall in a finished RV wall (airstream)?
Then also you will have one oddball outlet.
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groundhogy
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04/22/22 06:58pm |
Tech Issues
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RE: Water hose stuck on side of trailer..

I looked online and the chrome version of that inlet costs a C-note i think.
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groundhogy
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04/21/22 05:27pm |
Tech Issues
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