1. The vent heaters-are not-generally controlled-by a switch, just th
e breaker and an internal thermostat.- On smaller planes, its just a ligh
t bulb.
-
2.- $2.00 will buy you a can of electrical contact cleaner or just a can
of compressed air (for cleaning computer parts). and a $10 volt-ohm-meter.
-
3. Open the inspection port, you'll need access to the leads at the vent he
ater. Disconnect the power lead and test between the power and the heater.
- It should show an "open" circuit (if the temp is above ~40F).
-
4.- Give the vent/heater body-a shot of cleaner to chill it down.....Th
e heater has a thermostat which should close and the VOM should show power
going to the heater.- (it should also feel warmer to the touch if only fo
r the time it takes to warm up to ambient temp.
-
-
Another way is to remove the vent heater and do the same test on a bench, i
nside where its warmer.
-
If you are still unsure, spend the $65 to have your A/P do it and have him
swear on a stack FAA manuals.- I prefer to wait in the customer lounge an
d chat up the FBO secretary....
----
-
what was that saying...."Nothing in life is sure....less so..........- oh
well, I forget."
-
wer
--- On Mon, 11/17/08, Moe-rosspistons <moe-rosspistons@hotmail.com> wrote:
From: Moe-rosspistons <moe-rosspistons@hotmail.com>
Subject: Re: Fuel Vent heat Test?
To: commander-list@matronics.com
Date: Mon, 17 Nov 2008 07:47:48 AM PST
Mike,
-
Do you think that it would be OK just to spray them with a c02 fire extingu
isher?
-
Moe
From: mike floyd
Sent: Monday, November 17, 2008 7:06 AM
To: Matronics Thread
Subject: RE: Fuel Vent heat Test?
Fill a cup with ice water and submerge the vents wait a few minutes and the
n turn them on. Or remove the vent heaters and put them in the freezer, usi
ng an ohmeter see if there is continuity through the thermostats.
From: moe-rosspistons@hotmail.com
To: commander-list@matronics.com
Subject: Re: Fuel Vent heat Test?
Date: Mon, 17 Nov 2008 07:47:48 AM PST
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Robert,
-
The fuel vent heaters and the lift detector (stall warning switch) have tem
perature control on them so that they will not feel hot to the touch.-The
fuel vent heaters (at least on my bird) do not feel hot on a cold day, how
ever they are warmer than the surrounding under wing skin.- If you get a
definitive answer about testing please share.- Quite some time ago I made
a similar post and did not get a complete reply from anyone.
-
Moe
N680RR
Proud Holder of The Golden Pedal Award
From: Robert S. Randazzo
Sent: Monday, November 17, 2008 2:20 AM
To: commander-list@matronics.com
Subject: Fuel Vent heat Test?
Commanders-
Does anyone have a fool-proof method for testing the fuel vent heaters?
-
On a whim I decided to test them by turning on the battery, connecting the
buses and activating the L/R Pitot and Fuel Vent heaters.
-
Pitots heated up enough that you could fry an egg- but the fuel probes did
not warm even slightly.
-
This made me wonder if the fuel vent heaters are load-shed without a genera
tor on-line?-- (Yes yes- sometimes I have trouble keeping the big airpl
ane stuff and the Commander stuff segregated in my brain=85.you should have
seen me flaring at an eyeball height of 70=92.. HAHAHAH=85. Oh boy=85.fort
unately it turned out okay for everyone except my ego=85)
-
We=92re getting into the ugly part of the icing season out here- and I=92m
going to be making a bunch of trips over the mountains during the winter- s
o I want to make sure my ice survival equipment is in top working condition
.
-
Robert S. Randazzo
N414C
-
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