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PulsaCoil PCS Common Faults

PulsaCoil PCS Common Faults

PulsaCoil PCS Common Faults

The Pulsacoils PCS from Gledhill with a stainless steel internal tank is also known as the “Pulsacoil PCS ECO.” All earlier models had pinhole-leak-prone copper thermal cylinders storing the water within. Due to the urea-formaldehyde foam and riveted external steel shell blocking access to the inner copper tank, these leaks could not be fixed. This meant that the only way to fix any pinhole leaks on the cylinder was to buy a brand-new appliance.

By using a stainless steel inner tank in place of a copper one, the Pulsacoil PCS thermal stores solve this issue. Only time will tell if these last longer than the versions with copper tanks, but thus far, things are looking fine. A Pulsacoil Stainless with pinholes has yet to be seen.

The exterior case and internal stainless steel cylinder, heat exchanger, and heater elements of the PulsaCoil PCS ECO model look to be identical to those of the original PulsaCoil Stainless model, however, the pump, circuit board, and water flow/temperature sensors are entirely different. A small circuit board now controls a low-energy pump and a sophisticated flow sensor with no moving components in place of two heat sensors, a Grundfos pump, and a huge circuit board. Despite the fact that there appears to be no temperature reader, it all seems to operate well – most of the time. The tap water temperature is kept at a constant level, and the pump is cut off as expected when a hot water demand ends.

PulsaCoil PCS Common Faults

Here is a list of the common faults found with a PulsaCoil PCS:

PulsaCoil PCS Immersion Element
Similar to the majority of earlier Pulsacoil models, the heater elements leak even though they hardly ever really crack and stop heating. The thermostat pocket corrodes through, allowing water to get into the wiring connection box and occasionally even into the thermostat itself. This either trips the overheat protection thermostat or blows fuses.
PulsaCoil PCS Failed Thermostats
The immersion element thermostats malfunction in a variety of ways. They can be damaged by water ingress when the pocket encasing it leaks, the integrated overheat protection built into them can randomly trip occasionally, requiring resetting, or the overheat thermostat can trip correctly when the unit is overheating. They can also lose their calibration and turn OFF at too low or too high a temperature.
PulsaCoil PCS Scaled Heat Exchanger
The flow rate (the amount of water coming out of the taps) decreases until it is just a trickle while simultaneously emerging cool. This occurs when scale builds up inside the plate exchanger. Chemical methods can be used to get rid of the scale, but they take time and are costly. The most cost-effective solution is to install a new heat exchanger.
PulsaCoil PCS Water Runs Cold
This is a problem with the PCS ECO version only. The consumer typically complains that the other taps are working great but the shower runs cold. This is due to the fact that certain showers are actually highly water-efficient and draw too little flow to activate the flow sensor and turn on the pump.

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