Home > VansAirForceForums

-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

Old 01-19-2022, 06:26 AM
rowsley rowsley is offline
Join Date: Feb 2021
Location: Texas
Posts: 14
Default Cabin Heat Control

I am having an issue with my cabin heat. There's plenty of heat but the control gives pretty much full on or full off. I've checked the control box and all seems normal but I get full heat when I first crack it open. Is there a better way to modulate the heated air flow?
Reply With Quote
Old 01-19-2022, 10:05 AM
wcalvert's Avatar
wcalvert wcalvert is offline
Join Date: Jan 2019
Location: Anacortes Wa
Posts: 452


You say your linkage is working well and the ratio is reasonable (a real short arm on the door might make for twitchy response).

Then what you're seeing is probably just what you'd expect. A big blast of hot air due to all the super-heated metal in the system dumping all that heat at once.

Does the temp settle down after it runs for a few minutes? Mine (-7) drops significantly in cold weather after 60 seconds.

Good luck!
RV-7 Tipper
Bill (Wild) VA-165 '90-'93
Anacortes, Wa

First Flight 7/17/2021!! 200 hours 6/22
- Been there, Donated 2022
Reply With Quote
Old 01-20-2022, 05:17 AM
rowsley rowsley is offline
Join Date: Feb 2021
Location: Texas
Posts: 14

The heat stays the same over time. There seems to be no modulation of the airflow, it's just ON or OFF. I'm not sure what heat control I have. Is there one that is good for this? I see several types for sale on Spruce and other places. The only other solution I thought of is swapping the inlet and outlet hoses to see if that makes a difference.
Reply With Quote
Old 01-20-2022, 07:28 AM
calpilot calpilot is offline
Join Date: Aug 2018
Location: Independence
Posts: 230

I put an electric servo on the cabin heat door, with indicator. Some have gotten a bit more fancy and added a thermistor to be able to select the heat, it works well, but there is a caveat.... If there is a fire or electrical issue, it might preclude shutting off the valve. But.....I like it.
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -6. The time now is 01:32 PM.

The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.