The thermostat has a range of 40 degrees on the freeze setting (snowflake), then 55-80 degrees. It’s very easy to use and we appreciate the automation of a thermostat.
The thermostat cycles the heater on and off. The Propex’s fan sound is noticeable but not overbearing. It is rated at 60 decibels. We don’t generally leave the Propex on when we go to sleep. The cycling is just loud enough to be a bit disturbing when sleeping.
From outside the van, the Propex is audible but not noticeable unless close to the vehicle.
You may get an error/fault, ranging from poor gas or electricity supply to internal heater malfunctions. In the event of a failure the red light on the thermostat will flash a certain amount of times, pause, and repeat until switched off. Count the amount of flashes and refer to the table in the manual.
As mentioned we got a “combustion air fault” which is related to poor air flow from the air inlet or exhaust flues under the van. We slightly rearranged the exhaust flue (stainless steel hose) to totally minimize any bends, and no more error.
The lockout must be cleared by turning the ‘Fan Only’ setting on the control panel, ‘on’, ‘off’ and ‘on’ again within 2.5 seconds. If the first lockout reset attempt is unsuccessful, you can retry an additional 4 times. If the lockout still will not clear (identified by a solid LED), turn off the heater, check the heater for faults, power up the heater and then further lockout reset attempts can be made.