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Old 05-29-2016, 06:56 AM   #1
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Furnace making clicking noise

Big storm rolled through last night. Lots of wind and water, but we survived with no real impact. However, we were broadside to storm and after thought is that it would have been better to bring slide outs in.

In middle of storm, lights started pulsating to a clicking noise coming from below the refrigerator. Thought refrigerator at first, but isolated to the furnace.

Pulled 15 amp fuse and noise stopped.

This morning weather is clear. 67 degrees at 8am, so certainly don't need furnace.

Decided to check to see if pulling fuse would have created a reset and all would be well. Put fuse back in and noise started again. Re-pulled fuse when noise started again.

Any thoughts? Furnace was not being used at time of storm. And is not
turned on, when noise is happening.
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Old 05-30-2016, 08:05 AM   #2
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Just a follow up.

I got in to the furnace compartment on the outside. I was familiar with how to get in there by checking it out before when just looking over truck. When we get a new RV, I always take time to try to get in every part. I want to learn the access and what's there before I have to.

When I opened the compartment by removing the exhaust tube first, held in place with 2 screws, and then the compartment hatch with 4 screws, I found lots of moisture. Electric components and circuit boards were wet and dripping water from straight driving rain driving in through the vents.

We weathered a major storm in the unit the night before.

Dried everything with paper towels and wife's hair dryer. I always promise her, I'll buy her a new one if I damage her hair dryer.

Once dry, replaced fuse and no clicking noise. Everything good.

Used "laminate paper", with backing on it, and a couple of pieces of duct tape (never leave home with out it). to create a flap directly over the electrical contacts.

This should prevent direct water impact to circuits, but don't know if it would stop the moisture level in the compartment. it was like pointing a water hose directly at the vent opening.
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Old 05-30-2016, 08:25 AM   #3
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Thanks for the update.
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Old 05-30-2016, 09:27 AM   #4
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I'm wondering if one of those bug screens would knock, dissipate, the water flow enough to keep it from entering?
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Old 07-20-2016, 09:10 AM   #5
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Thanks for posting

To the OP. Thanks for putting this fix out there. Ran into the same issue last night. The clicking started and I thought for sure I was going to have to pack up. Quick search of the forum and I found this thread. Shut everything down, waited for morning, and followed the fix you posted and we are back in business. Thanks again!
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Old 08-20-2017, 04:02 PM   #6
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Likewise, thank you for this post , I'm having the same issue , i actually just got back from a trip today , parked my camper and heard what I thought sounded like a defective relay and I thought it was coming from the refrigerator also .
The noise was coming right underneath fridge . I took off the vented wall panel and located the Furnace , mine had a switch on top of it , so I clicked it and the problem stopped.
I tried turning off all the breakers first but it dint do anything.
The noise sounded like it kept trying to turn on and off every second and I guess it was drawing power right from the battery.
We also had a lot of rain the first day of camping but there was no issues until today.
Im going to have to look into it tomorrow and see what's going on also. At least I have this post as a guideline two to open up the panel outside to see what everything looks like.
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Old 08-21-2017, 07:32 AM   #7
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The wife's hair dryer is the key to the repair.

Used a plastic cup as the final solution to protect the circuit board from a direct hit by water.
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Old 09-30-2017, 09:15 PM   #8
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Thanks for posting! This is great info.
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