Electric heating in the A/C unit?

My Pod came with an A/C manual. The manual states that there is a heating element in the A/C roof unit if the A/C control knob says "Heat". The manual also states that if the control knob does NOT have a heat position, there is no electric heating element in the unit.
However, after setting the control knob to 'heat' I have never been able to get any heat out of the unit...the fan comes on but no heat.
Is there any way to check on whether or not my A/C does have a heating element?
By the way, the fan is so noisy that I use a portable electric heater.
I probably will never use the A/C heat...but just wanted to find out if the Pod A/C actually had heat.

UPDATE: I received a couple of emails from members warning me that the heating element in the roof A/C might be a fire hazard. Heat rises but with the element up in the A/C...if there was an electric cutoff (fuse blown, etc.) the element could potential cause a ceiling fire, if the fan accidently shut off.
I will stay with my portable heater.

     We have a 2009 171 with the AC unit we have heat on the control knob too but no heat. You can buy a heating element thats plugs in to a connector inside the AC unit. I have heard some reports that you need to be careful on how you place the heating element that nothing is near the element to start a fire. " You Need To Be Careful ". If you check some of the RV parts companies you can find the heating element. It does noy have that much wattage so it doesn't produce a lot of heat. If you do a search on the Rpod Owners forum you can find more information.

     The price of the heating element when I checked a few years back was more than a ceramic heater. And that is why we decided to go with a portable ceramic heater and you get more heat if needed and too I think they would be safer.

On my Dometic wall control the switch reads Cool, Off, Furnace.  The propane furnace starts up when I set it to Furnace.  The fan runs first and then the heat comes in under the bed.  We just use that on very cold nights and for a short time.  An electric heater is the best bet, I think.