[Dan]

You can call Master Appliance at 800-558-9413

http://www.masterappliance.com/

[Andre]

Thanks Don. I have the owners manual, and it also says to oil it, but doesn’t say where. Calling them tomorrow.

[Dan]

We have the same heater; and look forward to the update to this post.

We had never oiled it -and it worked great for years…

However, I just went to storage to get the rig ready for this ski season.. and ours isn’t producing heat.

I plan to remove it and troubleshoot.

The fan works great, just the heating element. Perhaps just a loose connection.

I also saw in another post that Jon replaced it with a different unit.

Any suggestions?

We’re open to replacing it with a better heater.

UPDATE: I pulled it and it’s a disconnected wire. I’ll put it back together, oil it, and reinstall.

Thanks Jon! Great idea. Typically, we use the webasto to the same end (to warm the water tank and keep the bays warm) when on the road, but I will likely pick up a cube ceramic heater for redundancy.

[Dick]

Called Master Appliance, they said there were two oil holes near the base of the switch. One can be accessed without removing anything, but the second one requires removing the base. I did not remove anything, so no oil was applied due to limited access. It does not look to difficult to remove, but my strategy is to replace it with their new model when the old one fails.

The old model is black and requires oil. Their new replacement model is red in color and does not require any oil. The model number old and new is AH-751. The price at the manufacturer web site is $325. The price at Zorodotcom is $175. This is a heat gun that produces 750 degree air one inch from the end of the nozzle.

[Dick]

I should explain why I went with a small cube heater and did not use the Liberty installed heater which is more like a heat gun.

When I did that on the first coach we lived in western NY and the bus was in a barn out of the wind, but it got as cold inside the barn as outside. We had occasional power outages and we had at least one week per winter where overnight lows were minus 20 with daytime highs remaining below zero.

I wanted heat to accumulate and the best storage for heat was the mass of water in the tank. A heater aimed directly at the tank about 6 inches to a foot way would allow the water to absorb the heater output. I could leave the heater on 100% of the time and never had to worry about a need to keep adjusting it. With it set early in the season by the time it got really cold the water temp was around 60 degrees. After a week of sub zero temps the lowest the water bay got was 45 degrees which was plenty of margin. The warm water was as much as a heat source as the cube heater.