as it turns out my treadmill is on the blink as well.
The electric motor is on its last legs and always trips the circuit breaker on the treadmill right in the middle of a walk or jog.
Getting these things fixed isn't as easy as it should be either.
I tried to order a new motor from the USA and was initially told that the cost would be around A$350.
When it finally arrived in the country, 3 months later!, I was told that the price I was quoted initially was incorrect and the new price was closer to A$750!
I politely told them what they could do with their $750 motor!
Now I have to find a company locally who reconditions electric motors which is sure to be a hassle, but I hope a lot cheaper than $750 bucks.
My only consolation in all this is that I've had the treadmill for a number of years and it has been used for 309 hours and has covered the equivalent of 858 kilometres.
Having said that, it has needed a new deck and a new walking belt in the time that I've had it.
With regards to your blow fly issue, have you tried Aerogard Sunscreen?
If I'm going for a walk outside (in Melbourne) I don't leave the house without putting it over my face and neck.
When I do the flyes leave me alone - much to the dismay of others who swat themselves with tree branches as they walk past me, flyes driving them nuts!
Although I'm sure you have more blowies over there than we do here, it might just help.
Good luck with the treadmill!