Nordic/Maritime Geothermal system
We had 2 geothermal heat pumps installed in our new home in 2007 thinking that it would be more energy efficient and trying to do our part for "green energy" but its been a lot of trouble since then.
Manufacturer is Nordic/Maritime and units are EMW 65 and TF 65. EMW is used for radiant/floor heating whereas as TF unit is set up for heating water and forced air use.
In the last 6 years the compressor for EMW unit has been changed twice which should not be happening as these compressors have along life, yes the warranty is 5 years but they live much longer. The first compressor replacement was covered under warranty but the most recent one is not.
I am not sure if the problem is with installation or the machine itself. My thoughts go to installation as the first compressor burnt out in 2 years and the 2nd compressor burnt out in 3 years. Is there any way to figure out what seems to be the issue? Has anyone else had similair problems?
We have paid more than 5000 in repairs since 2007 till today.
Other frequent issues with the system have been as follows
1. air lock or what they tell me is that air bubble got in the pipes and they purge the system. They dont tell me how the bubble got into the closed loop system? This had happened almost once a year
2. It never starts with just setting the thermostat to heat and setting temperature, always have to call the installers in who almost purge theysytem everytime
3. We have back up propane boiler (Buderus) which is supposed to start when temperature gets too low and geothermal cannot keep up but it never does so
Any help in this matter is graetly appreciated. Thanks Rick