What's this

[subford]

If they are rubber vacuum lines any auto part store should have them.

[Lt46]

If they're the plastic, colored vacuum tubing, I used rubber,windshield wiper fluid tubing. I cutout the bad section and slipped the 2 plastic ends into the rubber tubing a few inches. It'll help to lube the plastic.

[ga traveler]

Originally Posted by Lt46

If they're the plastic, colored vacuum tubing, I used rubber,windshield wiper fluid tubing. I cutout the bad section and slipped the 2 plastic ends into the rubber tubing a few inches. It'll help to lube the plastic.

I have done this many times. It works well. If you want a one time cure, NAPA sells silicone tubing that will never go bad. I have part of a roll in my garage that is over 20 years old and still like new.

[ARFFMAN]

Does any of know what size hose I need. I'm going to take old hose to NAPA and get silicone.

[ARFFMAN]

Attached is a picture of the controls for my AC/Heater controls. Does this identify my system install on my MH?


Cant figure out how to rotate picture.

[Lt46]

Tough to say exactly, but Evans has something similar (emphasis on "similar") whereas Frigette does not. Have you tried to get this info from the Mfg?

[Climbon69]

I tore my dash apart several years ago and totally rebuilt it. I also did an over haul on the SCS/Fridgette heater/AC system. That control panel looks very similar to mine, except it has chrome knobs where mine are just black plastic. The whole system is vacuum controlled. I spent several days running down vacuum leaks. I have an inexpensive (cheap) vacuum pump that is hand operated and it's invaluable piece of test gear for vacuum systems.

In addition to the heat control servo in your photo, there are at least three more servos. One is a multi-port that will be on the bottom of your heater air manifold box under the dash. The others are simple on-off servos. One on left end of air manifold box under the dash, one on the outside of the firewall. The one on the outside opens the AC damper in AC mode. The one on left side controls upper/lower air flow.

I had to replace all of my servos as they all bled vacuum. I tried to "refresh" them by oiling their seals, but figured they would just dry out and I'd have to replace them eventually. I found multiple vacuum leaks where the vacuum lines penetrate the firewall and there was a vacuum leak on one line right at the control panel.

My NAPA store was able to find the servos and order them in for me. If I remember the multi-port was over a hundred bucks. The on-off ones were around $40 each. Guy at the store said he had redone a customer's truck with electric servos and a new control panel, but it wasn't cheap.

If you can get a vacuum pump you can check your system right at the control panel. Pull it out carefully and find the color coded lines coming out of the back of it. You can pull off one line at a time and connect it to your pump. Take your time as a small leak won't show up right away. When you pump up the vacuum, you should hear the servos operate.

On my old dash there was a panel just to the right of the gas pedal that could be remove to help access the air manifold box, but it was still pretty tight in there.

Good luck!

[ARFFMAN]

I can't find any identifying number on unit. I'll call Newmar and see if they can help me.

[bobpie]

[QUOTE=Climbon69;2601520]I tore my dash apart several years ago and totally rebuilt it. I also did an over haul on the SCS/Fridgette heater/AC system. That control panel looks very similar to mine, except it has chrome knobs where mine are just black plastic. The whole system is vacuum controlled. I spent several days running down vacuum leaks. I have an inexpensive (cheap) vacuum pump that is hand operated and it's invaluable piece of test gear for vacuum systems.

In addition to the heat control servo in your photo, there are at least three more servos. One is a multi-port that will be on the bottom of your heater air manifold box under the dash. The others are simple on-off servos. One on left end of air manifold box under the dash, one on the outside of the firewall. The one on the outside opens the AC damper in AC mode. The one on left side controls upper/lower air flow.

I had to replace all of my servos as they all bled vacuum. I tried to "refresh" them by oiling their seals, but figured they would just dry out and I'd have to replace them eventually. I found multiple vacuum leaks where the vacuum lines penetrate the firewall and there was a vacuum leak on one line right at the control panel.

My NAPA store was able to find the servos and order them in for me. If I remember the multi-port was over a hundred bucks. The on-off ones were around $40 each. Guy at the store said he had redone a customer's truck with electric servos and a new control panel, but it wasn't cheap.

If you can get a vacuum pump you can check your system right at the control panel. Pull it out carefully and find the color coded lines coming out of the back of it. You can pull off one line at a time and connect it to your pump. Take your time as a small leak won't show up right away. When you pump up the vacuum, you should hear the servos operate.

On my old dash there was a panel just to the right of the gas pedal that could be remove to help access the air manifold box, but it was still pretty tight in there.

Good luck![/QUI


I am chasing down vacuum leaks myself. I hear a leak at the control panel itself.
I just can/t for the life of me get the black plastic knobs off the front of the dash board.

Is there a special tool or something, or do you just pry them off with a screwdriver. I just don't want to break them.

I don't think the vacuum lines are leaking, but I think the control itself is leaking.

That there even looks tricky to get at and apart from my dashboard.

My dashboard does lift up to get access at the back of it which is a huge help.

Thanks for any and all answers.