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Old 07-04-2019, 09:19 AM   #1
Skins44
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Wasp in Furnace Vent

any ideas how to get them out? Can they get into the coach from that vent?
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File Type: pdf furnace vent.pdf (381.6 KB, 110 views)
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Old 07-04-2019, 09:33 AM   #2
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Spray them. It will kill some and the others should leave. I would assume they could get in. Buy vent screens on Amazon, real easy to install and come in a lot of sizes to suit whatever appliances you have.
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Old 07-04-2019, 09:40 AM   #3
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thanks Amy. Was contemplating spraying, but didn't want the spray to get too far into the vent (not sure why i am worried about that lol?).

I am in Maryland and traveling to VA Saturday. Obviously, we have no need for heat right now. Hoping the wasps exist the vent during our 3 hour trek to VA.
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Old 07-04-2019, 09:58 AM   #4
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The burner assembly is separate from the blower assembly that moves air through the coach.

When you turn in the furnace, two fans blow. One is for the burner that heats up the plenum (a series of tubes) and the other blows air across the hot plenum and into the ducts.

This is a simplified version, but wanted to assure you the “outside” stuff won’t mix with the “inside” stuff.
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Old 07-04-2019, 03:20 PM   #5
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Down south, mud dauber wasps can be major issue regarding heater exhausts etic Fixes include screen material aux. clip on dams parts that protect your inlets, and exhausts .

Any competent RV supply store in the affected areas should have an inexpensive fix.

Just a consideration, spiders love the smell of propane too, regardless of region. Fortunately, they are easier to deal with. Just clean the webs out, and proceed as usual.

Good Luck,
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Old 07-05-2019, 03:25 AM   #6
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Vacuum them out, and turn the furnace on low. You’ll have to get the cover off after. Carefully.
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Old 07-05-2019, 04:18 AM   #7
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Quote:
Originally Posted by Fishsizzle View Post
Vacuum them out, and turn the furnace on low. You’ll have to get the cover off after. Carefully.


Out here the mud dawbers build their nest as far in as they can, usually on the burner and igniter. Once that happens there is no lighting the furnace or vacuuming it out. Complete disassembly is required. That’s why screens are recommended at walkthrough. Water heater and refer areas, use cheap flea collars.
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Old 07-05-2019, 04:56 AM   #8
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Quote:
Originally Posted by chuckster57 View Post
Out here the mud dawbers build their nest as far in as they can, usually on the burner and igniter. Once that happens there is no lighting the furnace or vacuuming it out. Complete disassembly is required. That’s why screens are recommended at walkthrough. Water heater and refer areas, use cheap flea collars.
Good to know. I’m going off my experience with paper wasps, they must be a bit easier to get rid of.
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Old 07-05-2019, 06:12 AM   #9
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I cut slightly oversized pieces of alum screen to fit the refrigerator covers and the water heater cover. Nothing fancy and they remain in place when the covers are put back on. Also put a plastic plumbing cap on the generator exhaust (added a self tapping screw to hold it in place) and blue tape on the water tank vent. All to keep wasps out when parked at home. Easy peasy and effective.
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Old 07-05-2019, 06:20 AM   #10
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Putting screens on the refer vents will cause up to a 30% drop in efficiency. Norcold and Dometic have told us if there is a warranty issue and the customer has installed screens they will void the warranty. They both advised the use of flea collars.
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Old 07-06-2019, 09:48 AM   #11
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Where are we advised to put these flea collars exactly? Just in the compartment?
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Old 07-06-2019, 01:11 PM   #12
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I was told the same by an rv mechanic. where are you hanging the flea collars? If I open the outside cover to frig and freezer will I see?
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Old 07-06-2019, 02:08 PM   #13
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Flea collars go in the bottom access to the refer and across the bottom of the water heater.
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Old 07-07-2019, 11:59 AM   #14
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Quote:
Originally Posted by chuckster57 View Post
Putting screens on the refer vents will cause up to a 30% drop in efficiency. Norcold and Dometic have told us if there is a warranty issue and the customer has installed screens they will void the warranty. They both advised the use of flea collars.
The screens are on place only when parked at home.

The flea collars sound like a good idea, too.
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Old 07-11-2019, 01:05 PM   #15
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Been there, they wont get into the coach but your furnace wont sense the correct air flow and wont light. Spent a freezing weekend in Michigan's upper peninsula with this issue. Had to pull the furnace and disassemble as far as possible and use a coat hanger to tear the nest out and vacume/blow the particles out. I use screens now, cheap, easy prevention.
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Old 07-11-2019, 03:36 PM   #16
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Once you get rid of the existing problem, this is how to prevent it in the future.


https://smile.amazon.com/TOODOO-Flyi...s%2C209&sr=8-3
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Old 07-12-2019, 10:24 AM   #17
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Rubbing alcohol..kills on contact, evaporates.
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Old 07-12-2019, 10:46 AM   #18
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Quote:
Originally Posted by falcondan95705 View Post
Rubbing alcohol..kills on contact, evaporates.

Only if you can see them. Often times the problem isn’t apparent until the furnace doesn’t light. As stated above, complete teardown is required.
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