<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by DancinCampers:
I decided to add to this thread vice a new one because my project today dealt with the damper.
My understanding of the floor ductwork is there are 2 dampers, one at each end. The one near the LP furnace keeps the air in the ductwork when the Coach Aux Heater is on, and the one up front near the Coach Aux Heater keeps the air in the ductwork when the LP Furnace is on.
When we first purchased our MH I heard the same noise on the LP damper. After awhile though it went away. I did not think much of it because we did not use the furnace much. This past summer in the Pacific NW we did. I thought the airflow was low, so using a mirror and long rod I poked the damper while the furnace was on & the air flow increased. For some reason the damper was not opening all the way.
Soooooo, having a few weeks til the next trip I decided to remove the furnace today & investigate.
Removing the furnace is not hard, but a little tricky. Remove the outer cover (4 screws), then remove the heater rear cover (4 screws), disconecting the electrical and LP connections, then 2 screws which hold in the heater.
Here is a pic after removal:
Notice the damper in the back. Also notice the 4 standoffs which the heater rests on. The ones near the damper make is hard to remove/install the heater. More later.
I noticed that the frame which the heater fits in was not square. The right hand side was solid, but the left hand side was not.
Here is a pic of the upper left corner:
I could press this corner and it would go up and down. My thought is that the weight of the heater when installed made this corner go down, which in turn caused the damper to bind. There is not much space between the sides of the damper & the ductwork.
So I shimmed up underneath the corner & drilled a hole into the corner & the frame member next to it and installed a screw.
Here is the pic:
It is hard to see, but the screw is in the upper left corner.
No deflection now.
Back to the standoffs. I cut 2 pieces of 1/2 inch board, 1 inch wide.
Here is the pic of the wood inplace to help install the heater:
These help because when you install the heater without them, the back tilts down & it is hard to get the heater back up onto the standoffs. The wood provides a level track & heater went in real easy. To remove the wood I turned them sideways & pulled them out.
I put all back together, checked for leaks & fired it up. Much better now.
Time will tell if it works good on our upcoming trip to the desert.
Next project is to pull out the HWH & fix the Coach Aux Heater Fan.
Fun, Fun, Fun