Coleman Thermostat Issue

[GrantH]

I have an 06 Winnebago Journey with basement air and a Coleman Mach Tru Air thermostat. The A/C comes on fine but takes a very long time (10 minutes) to shut off after reaching the temperature set on the thermostat. This does not occur with the heat as it shuts down immediately upon reaching the set temp. I suspect maybe the thermostat is bad. What do you think and how difficult is it to replace the stat?

[John Hilley]

Does the temperature continue to go down? The thermostat is very easy to replace, just unplug the old and plug in to the new. Maybe it is your fan setting.

[jesilvas]

The t-stat is easy to replace, but there are some tests to run to see if that is the issue. That t-stat works off a 12V signal to the A/C control board. Once it reaches temp, see if the t-stat keeps sending 12V signal to the fan and compressor. If not, it's not a t-stat issue. If it does, I would call Coleman and ask if that is supposed to have a delay like that or not.