Furnace cleaning tips??

[wantboost]

When you guys go in for furnace cleaning do u cleanout all the pressure switch holes. If so what do u use ??

[R600a]

It depends on the age condition and type of furnace.

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[jconaway53]

Unless it's a newer install, it's easy enough, so why not?

[R600a]

I like to on 90% ers on the lower ports because i have had problems with them clogging. On 80% i have never seen that.
On a 90% i also like to hook a shop vac to the drain and sometimes even pull the inducer and dump water in that opening while the vacuum is sucking on the drain.

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[CircusEnvy]

I keep a piece of solid copper wire in my bag. Find plenty of them in attics where sparky trimmed the wiring. A very small drill bit works too.

[jbhenergy]

All, please elaborate on this. This is not something I have done but willing to add. What’s the science and reasoning behind this process.


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[Snapperhead]

All, please elaborate on this. This is not something I have done but willing to add. What’s the science and reasoning behind this process.


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once in a while you will come across a unit with a code "pressure switch stuck open"

and you think , awe dam the switch is bad

the little nipple where the hose connects on the inducer gets clogged

[DOGBOY]

I see it on 80% more than 90's. And I use an allen wrench you know the little one for the gas valves.

[jconaway53]

I typically just use a piece of Silfoss, seems to work great for me.

[Kris81]

Yes, if you are going in for a furnace cleaning, there's every reason you should clean the pressure switch holes too. Many a times, you will find them clogged to different degrees.

[wantboost]

Both pressure switch akde and collector and vendor side?

Yes, if you are going in for a furnace cleaning, there's every reason you should clean the pressure switch holes too. Many a times, you will find them clogged to different degrees.

[Averagetech37]

I also use a small Allen wrench have seen both 90s and 80s clog. Typically the 80s where the nipple comes off the inducer housing will clog with rust or debris

[Poodle Head Mikey]

I always did.

I use a 'just fits' drill bit and turn it clock-wise with my fingers as it goes in and out. So I can see if it actually collects anything.

I like to blow out all the hoses as well. While I have them off I inspect for signs of the rubber cracking.


PHM
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When you guys go in for furnace cleaning do u cleanout all the pressure switch holes. If so what do u use ??

[theoldscroll]

I also like to check that tiny weep hole in the pressure switch itself and clear it out if obstructed with dust,etc. I use a broach for that. I was told long ago that was the reason for PS failures that moisture would get trapped inside and needed to "vent". Don't seem to see as many failures the past few years, as was 10-12 yrs ago.