Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×

Go Back   Thor Forums > Thor Community Forums > Introduce Yourself | Say Hello
Click Here to Login
Thread Tools Display Modes
Old 03-14-2021, 01:02 AM   #1
Junior Member
State: Arizona
Posts: 1
THOR #22517
2018 Thor Windsport

Hi, I am not new to RVing but I am new to this platform. Believe me...every year and every season I learn more and more about this 'hobby'. We just finished to unwinterize our unit and during the last walk around the rig before we completed for the day I noticed this hissing noise coming from behind the water heater and behind the sink. Everything was in the OFF position. I cannot figure out what/why and if this was drawing power. I never noticed this before and cannot tell if this is an anomaly. Is this supposed to be like and/ or for how long this should continue?

Your comments are welcome.



T REX#2 is offline   Reply With Quote
Old 03-14-2021, 05:55 PM   #2
Senior Member
Brand: Thor Motor Coach
Model: Winnebago Travato 59G
State: Alabama
Posts: 4,732
THOR #6826
Probably not a normal situation if “everything was off”. Other than the propane burner water heaters don’t make much noise. If the water was connected to a shore supply or your pump was on you might look for a leak. I hope that’s not what you’ve got!
Pete'sMH is offline   Reply With Quote
Old 03-14-2021, 11:31 PM   #3
Senior Member
coachray's Avatar
Brand: Thor Motor Coach
Model: Quantum RQ29
State: Ohio
Posts: 1,294
THOR #13648
Not sure about your problem but welcome to the forum. Hopefully not a leak.
coachray is offline   Reply With Quote
Old 03-15-2021, 01:26 AM   #4
Senior Member
MJC62's Avatar
Brand: Thor Motor Coach
Model: A.C.E. 27.2
State: Indiana
Posts: 1,574
THOR #14698
Welcome aboard!
Is this hissing noise coming from the Hot Water Heater compartment outside? perhaps the heater plug is not tight enough and the heater is bleeding off built up air or water pressure?
Or if inside is one are one of the winterization valves on the HWH partially open? Once again bleeding off pressure?
I don't know how you de-winterize, I leave my HWH valves in winter position (don't want pink crap in the heater) and hook up the air compressor to the city water inlet. I build up around 40 psi and open valves staring farthest away in the bathroom and blow the pink crap out of the lines, working back to the kitchen sink last.
There is plenty of hissing and pressure bleeding off while I do this.
Good luck with the search.
2018 ACE 27.2
Toad 2019 Jeep Cherokee Trailhawk
Roadmaster Falcon All Terrain Towbar
Roadmaster Invisibrake
MJC62 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.

All times are GMT. The time now is 07:57 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2