bad Pump?

[stumper]

My Eclassic 2300 sprung a leak so replaced it with a new edge 7500 titanium.  Clearly the new boiler has been better engineered!  However, I am having an issue, my oil boiler keeps coming on.  That only happen if there was an issue with the old boiler.  Now it happen and I go check the boiler and it is at temperature.  Same pump, same run, same set point on the oil boiler.  Bumped the temp on the new boiler to 190 so it calls for heat at 180, the same low point as the old one.  I can't figure it out.  I am wondering if my pump is not moving enough water.  Thoughts?  Suggestions?

[hedgerow]

A few quick questions. Did you make sure the line got bleed when the new boiler was installed Do you have any Y strainers at heat exchanger where the OWB and the oil boiler is mated. Usually you can use a temp gun and see if you are flowing. I can usually tell by feel if I have a Y strainer or a pump problem on my Garn and I am not getting good flow.  

[stumper]

No Y strainers.  I know I am getting flow I just do not know If I am getting "full" flow.

[hedgerow]

Is the plate heat exchanger that is between the OWB and oil boiler plugged up giving you flow Issues? 

[mike_belben]

Pull the circulator cartridge and see if its spinning under power. 

[trapper]

I find the taco impellers disintegrate every couple of years

[woodmills1]

Up here we call that nachoing your taco

[doctorb]

Do you have a temp gauge on the inflow from your OWB to your basement oil burner.  If so, reduced flow should show some loss of temp from the water leaving the stove to your house.  Now, there is a normal loss of heat in the thermopex lines, but, depending upon the distance of the OWB from your house, it shouldn't be great.  I have a 300' distance and I lose 6-8 degrees.  If you're losing 10degrees or more, you must have a flow issue.