Thread: No heater, its been disconnected

I'd say it was leaking.
You could hook it up and pressure test the system.

Originally Posted by Mick_Marsh

I'd say it was leaking.
You could hook it up and pressure test the system.

How would one go about pressure testing a heater not really wanting to have the cabin start filling with water or having electricals shorted out

Originally Posted by 3lud13

How would one go about pressure testing a heater not really wanting to have the cabin start filling with water or having electricals shorted out

You've heard of air? Suggestion: fit a length of heater hose to each pipe, clamp a tubeless tyre valve into each hose, then use a pressure gauge and a bicycle pump. Pump it up to around your cap pressure and listen for whistling noises from the heater area.

This is common practice. The high cost of a new heater core plus the amount of expensive labour involved in replacing it as it usually involves taking half the interior of a modern car out to do so. In Qld. a car so modified should not be eligible for a Safety Certificate and would have to be sold unregistered unless the seller can find a co-operative licenced inspector. One ruse to overcome this involves hooking a 12 volt hair dryer into the demister plumbing to provide a stream of warm air when the inspector tests the demister.