Yeah is non air con model, wouldn't say no to air con though!
Checked the realy, but not much I can do without another one to replace & see if thats at fault, not checked anything else yet, seem to recall that the overheat switch/resistor is on top of the heater unit, in an inaccessible place & would need the dash removing to get at it, unless you are a contortionist & can get your hands into the air intake?