I have been trying 2 work my heater out nearly every after noon 4 the last few days. This is my question: On the side there is 2 terminals, wat plugs them in and wat do they do. There is a spring inside which is connected to it??????, Also wat settings do you guys have yours on, on the dash and does it work well????, mine works sort of but not great. and seeing as though im on the road a 6:20 each lovely freezing bloody cold canberra morning, then i really do need a heater. Anything else that you recommend 2 check, will be greatly appreciate. Its for a 81 120 ute

The two plugs are for the fan, also the spring. It controls fan speed i think.

Check that the tap is opening fully. its on the driver side under the dash.

the heater core may have leaves or dust covering it.

Mine works great, its well worth getting it working.

its weird but, i unplug it and the fan keeps going. i have tried as much as i can. The tap opens fully, but is leaking a tiny lil bit of coolant. could my hoses be blocked and if yes wats the best way 2 unblock them. any other tips, and the core isnt blocked, but can the stuff up. im still getting warm air out, its just not pumping as much as i reackon it should be

If you have a properly working 1200 heater, then carry a passenger in the morning. These things can put out enough heat to cook toast, so your passenger can feed you breakfast on the way in to work.

If your heater hoses are blocked, then they are probably deteriorated inside, so replacement is the only real fix.

are you serious. well mines definately not working . where should i start in diagnosing the problem. i have a spare core here