Hi all! I have a small air exchanger at home (Venmar model EA1500) and recently, the unit has started to make some intermittent strange noise, which sounds a bit like a steel on steel noise or something similar. Needless to say, I think the bearings will need replacement sooner than later. The building inspector who inspected the property before I purchase back in February 2012 indicated in his report that the bearings were going and would need replacement within 1 year... I think he was right on. I have contacted Venmar (the manufacturer) and they told me that I would need to replace the entire motor assembly as the bearings were contained within the motor assembly. They gave me a service contact in my area and I called them. The guy told me that I couldnt replace only the motor as the whole fan-motor-bearings were ONE assembly (apparently typical of Venmar's products). A shame because the assembly costs $257 and the entire machine cost brand new $499.... The service guy also indicated that I could send the motor assembly to a motor repair shop and they could replace the bearings for a low cost. I am considering to do this. Has anyone experienced such problem before? Cant imagine no-one has... On a different but surely not unrelated topic, the previous owner was a heavy smoker. The air coming out of the exchanger smells like cigarette... The unit is probably all coated with nicotine and probably pretty dusty (you can imagine the mud inside... yuck!!) Can you clean this??? Basically, would you recommend to replace the whole unit or service it? Except the cigarette smell and noisy bearings, everything else seems fine to me so I'd like to seervice it for low cost and keep using it... Any opinion are welcome! Thanks!