Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Thread Tools Display Modes
Old 08-05-2018, 01:57 PM   #1
jeeepz's Avatar
Brand: Thor Motor Coach
Model: windsport hurricane 34f
State: Tennessee
Posts: 54
THOR #9067
dash a/c goes to defrost under load

2015 windsport 34f, on long hill climbs my a/c changes from vent to defrost.comes back again when I let off throttle for a few secs. I have experienced this withholder chysler minivans and it was a lack of vacuum to a/c control head under load. I found my windsport has a vacuum cannister and it seems to hold vacuum,no obvious leaks found. has anyone else had this issue?

jeeepz is offline   Reply With Quote
Old 08-05-2018, 02:36 PM   #2
Senior Member
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 1,750
THOR #6411
When the engine is not producing sufficient vacuum, the vacuum canister must supply the needed vacuum as you stated, There must be a vacuum leak in the system that the canister can not overcome. You can isolate each component in the system and using a hand held vacuum pump test each component. Usually you will find a split in a vacuum line where it connects to a component.
Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
Beau388 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 07:19 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2