Heating repair in Hesse

Typical heating problems — and what's behind them

A heating system that no longer works properly can have many causes. Some are harmless and quickly fixed, others require thorough on-site diagnosis. The following problems we encounter most often during our service calls in Hesse:

• Heating doesn't get warm — Often caused by an incorrectly set heating curve, a stuck valve or a defective circulation pump. Air in the system can also cause individual radiators to stay cold.
• Heating won't start — If the system doesn't even start, ignition electrodes, gas valve, fuses or the control board are possible fault sources.
• Heating loses pressure — Constant pressure loss points to a faulty expansion vessel, a dripping safety valve or a leak in the pipe system.
• Error code on the display — Modern heating systems show error codes that point to specific components or conditions. We know the codes of all common manufacturers and can pinpoint the cause precisely.
• Unusual noises — Knocking, whistling or humming in the heating are warning signals. Causes range from air in the system through worn bearings to limescale deposits in the heat exchanger.
• No hot water — If the heating runs but no hot water comes out, a faulty diverter valve, a clogged plate heat exchanger or a broken temperature sensor may be responsible.

First aid for heating faults

Before calling us, you can check a few simple things yourself. In some cases the fault can be fixed that way:

• Check the fuse — Check whether the heating's fuse has tripped in the fuse box. Switch it back on if needed.
• Check the gas shut-off valve — Make sure the gas valve at the heating and at the gas meter is open. After work in the basement it sometimes gets accidentally closed.
• Press the reset button — Many heating systems can be reset via a fault-reset button on the unit. Press the button briefly and wait whether the system starts again.
• Read the water pressure — Check the pressure gauge on your heating. For most systems pressure should be between 1.0 and 1.5 bar. If it's clearly below, water needs to be topped up.
• Caution with gas smell — If you smell gas, immediately open windows, do NOT operate any electrical switches and leave the building. Call the gas network operator or the fire brigade. Never try to operate the heating yourself in this case.

Our process in 6 steps

Repair or replacement?

Not every defective heating needs to be replaced immediately. In many cases a repair is the more economical solution — provided the system is fundamentally in good condition. We advise you honestly and without sales bias.

As a guide: heating systems younger than 15 years can usually be sensibly repaired. Spare parts are available, and the technology is largely up to date. For systems between 15 and 20 years we check the overall condition and weigh up with you whether a repair is economically justifiable or modernisation is cheaper in the long run.

For heating systems older than 20 years we often recommend replacement. Not only because repairs on old units become more expensive and spare parts harder to source — but also because a new heating system uses considerably less energy. Through the Federal Funding for Efficient Buildings (BEG) you receive attractive subsidies of up to 70% when switching to a heat pump or hybrid system. We advise you on the funding options and, on request, also handle the application.

Which heating systems do we repair?

We repair all common heating systems regardless of manufacturer. Our team is trained on the following system types:

• Gas condensing heating — Wall units and floor-standing boilers of all capacity classes. From the small gas thermal in a flat to the large boiler in a multi-family building.
• Oil heating — Oil condensing boilers and older low-temperature boilers. Including burner replacement, nozzle change and oil-supply repair.
• Pellet heating — Pellet boilers and pellet stoves with automatic feed. We fix faults in the auger, ignition and controls.
• Heat pumps — Air-to-water, brine-to-water and water-to-water heat pumps. Diagnosis and repair of controls, hydraulics and refrigerant circuit.
• Hybrid heating — Combined systems of heat pump and gas, or heat pump and oil. We understand the interplay of both heat sources and find the fault even in combined systems.

We work manufacturer-independently and repair units of all brands — including Viessmann, Buderus, Vaillant, Wolf, Junkers, Bosch, Brötje, Weishaupt, Stiebel Eltron and many more. If a spare part isn't immediately available, we order it at short notice and arrange the follow-up visit with you.

Frequently asked questions