An Aquatop CP-25 circulated pump is rated at 30 amps. The pump will not typically draw this much current unless it is under fully load or is pulling a contaminated mixture.
If the pump is not circulating coolant insure that the thermostat is not stuck closed. If the thermostat is ok then the pump will have to be replaced.
By measuring outlet temperature of water at downstream of pump and upstream of boiler.
The 6m head pump can lift 6 meters. The 5m head pump can lift 5m. Note this has no impact on the volume of liquid that is pumped.
A blockage in the downstream side of the pump could make this pump work harder raising the amps as the pump now has to do more work to get through the line. An upstream blockage would make the pump spin more freely lowering the amps on the pump as it will not be doing any work.
To answer this question the pump's voltage is needed.
If the engine is warmed up, the thermostat has opened and coolant is circulating, the pump is pumping.
To replace the circulating pump it will cost between $150 and $300 depending on the hot water heater. It will also cost you labor fees if you have someone install it for you.
Water pump shaft loose? Water pump leaking? Water circulating in coolant system?
Almost always the monovalve or circulating pump.
The factory pump uses 6 to 9 amps depending on the condition of the pump. A worn pump uses more power of course. I don't know what problems if any you are having but if you blow a 10amp fuse then change the fuel filter, a pluged filter will make your pump work much harder. Still blows? Then time for a new pump. Aftermarket pumps such as a Walbro pulls almost 15 amps.
Amp rise
You should see the coolant circulating in the radiator when the car is running