Junkers ZW20 boiler heat exchanger block. Reference: 87054062030

OBSOLETE PART. YOU CAN INSTALL THE FOLLOWING MODIFICATION:

SPARE PARTS

12 INOX plate heat exchanger, NORDIC TEC 25-100 kW PL7991921264

Standard

90,00€

Reference: PL7991921264

Express 24h Available!

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ZW20 Heat Block

What is a boiler heat exchanger?

A heat exchanger in your boiler works by converting energy (heat in this case) from gas to water.

Water passes through the heat exchanger in the boiler, heating up in the process. The water is fed into the central heating system through a flow pipe. It circulates around the heating system and returns through the return pipe.

As water passes through radiators, towel rails, and pipes, it loses temperature. And when it re-enters the heat exchanger, it is reheated, and the process continues.

Possible faults of the Junkers ZW20 boiler heat exchanger

If it makes noise

Sign of limescale, sludge, or dirt buildup in the heat exchanger. That noise comes from the bubbles of heated water vapor

If the boiler turns off

If the boiler has an NTC probe, this probe monitors the temperature of the water leaving the boiler. If the temperature is too high, it will shut down.

When a heat exchanger is clogged with limescale or sludge, the water can overheat.

The probe recognizes that the water temperature is abnormally high and turns off the boiler.

Please note that in this case the Junkers , not the heat exchanger.

Water leaks

Accumulations of limescale, dirt, or rust can cause cracks in a heat exchanger.

This can cause leaks in the heat exchanger, which would then cause the boiler to leak water.

The internal components of the heat exchanger may also break or crack, and the boiler may not heat the domestic hot water or reach the correct temperature as well as in the heating system.

Solution:

If the problem is dirt, you can clean it with a descaler and reassemble it. If the heat exchanger has rust that won't come off or cracks, it must be replaced. Sometimes, simply cleaning it won't get it to reach the correct temperature. We always recommend replacement.

In any case, we have a specific spray for cleaning heat exchangers:

ACCESSORIES

Ecoforest pellet stove heat exchanger cleaner

Ecoforest

8,71€

Reference: 67243

Express 24h Available!

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COMPATIBLE MODELS: