Repairing Guides

how to repair radiant floor heating system

by Prof. Malcolm Torphy MD Published 2 years ago Updated 2 years ago
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How to Repair Hydronic Radiant Floor Heating Systems

  • Seal leaks. Hydronic floor heating systems sometimes leak. ...
  • Change panels. Panels protect your floor from cracks as they absorb the heat from the system. ...
  • Change Mixing Valves. Mixing valves thermostatically control water temperature for distribution to the heating pipes. ...
  • Airlocks. ...

Part of a video titled How to repair a damaged electric floor heating system
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So I'm going to do a solder repair this is the best repair you can do because it's the most.MoreSo I'm going to do a solder repair this is the best repair you can do because it's the most. Permanent. All right once I have a good connection there I can go ahead and move over the heat shrink tube.

Full Answer

Does your radiant floor heating need repair?

While radiant heating mats are designed to be durable and last a very long time, they can still be subject to problems- and fixing it is a whole ordeal. Cut power to the mat until a repair person can check it out in case of electrical hazard, since faulty wires can lead to smoke or fire.

What is the Best Flooring for radiant heating?

Tips for installing radiant floor heating

  • Radiant heat subfloor. The subfloor of your home is the material that is below what you walk on, like your carpet. ...
  • Radiant heating in concrete. ...
  • In-joist radiant floor heating. ...
  • Floating floor over radiant heat. ...
  • Retrofit radiant floor heating. ...
  • Installing heated floors under tile. ...

How do you install radiant floor heat?

The benefits of heated floors:

  • It’s easy to install. You embed a cable-laced mat in the mortar when you lay the tile. ...
  • It’s safe. Once the in-floor heating system is installed, it’s nearly impossible to damage. ...
  • It’s inexpensive. At 12 watts per square foot, our 30-sq.-ft. ...
  • It takes up zero space. Got a big, clunky radiator? ...
  • It’s versatile. ...
  • It’s really, really comfortable. ...

Should you install a radiant floor heating system?

Should You Install Radiant In-Floor Heat?

  1. The consistency in temperature. You set the thermostat at a specific temperature and the system works on its own to maintain that temperature within the house.
  2. The heat starts at your feet. Radiant in-floor heat actually touches your body, allowing you to feel warmer. ...
  3. It's allergy-friendly.

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Can you repair underfloor heating?

In summary, yes, electric underfloor heating can usually be repaired without too much expense and disruption. So, if you're thinking about getting it installed in your home, go for it!

What to do if underfloor heating stops working?

Air bubble or airlock in UFH loop Isolate all of the UFH zones except for the zone that is not heating up. Remove the actuator. Connect a hosepipe to the flow valve on the manifold and connect to a cold mains tap. Connect a hose to the drain off point on the manifold and take out to waste.

Why is my radiant floor heating not working?

The main cause of problems with in-floor radiant heating systems is a defect in the wall thermostat. When your thermostat is defective, it will keep the heating from working properly. Thermostats that fail to close properly cause the room to be cold at all times.

How do you troubleshoot radiant heat?

Check Your Wall Thermostat - Wall thermostats are usually the cause of problems with radiant in-floor heating systems. If your thermostat is faulty, your heating will not work properly. It is always cold in a room with thermostats that do not close properly.

How do I find my underfloor heating fault?

We can detect a faulty heater by using a thermal imaging camera and specialist testing equipment which is used to locate the exact point of fault. The damaged cable or pipe is then accessed by lifting the floor for that area only and fixing the damaged heater.

Does underfloor heating need to be serviced?

Does underfloor heating need servicing? Although underfloor heating is largely maintenance-free, regular servicing is highly recommended. It's always better to regularly maintain a system to ensure it's constantly running smoothly and efficiently.

How do you reset a radiant heater?

0:391:06How To: Restart your Heating System - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe furnace of boiler. To reset your system locator en reset van de baan is located wordt de barmanMoreThe furnace of boiler. To reset your system locator en reset van de baan is located wordt de barman de unit prijs en rolde reset button for five seconds. And then release.

Does in floor heating fail easily?

Underfloor heating is likely to fail and cause major damage. While not all systems are created equally, there are options on the market that offer maintenance-free convenience and lifetime warranties.

How do I test my radiant floor heating?

0:050:55Radiant Heat Pressure Testing - YouTubeYouTubeStart of suggested clipEnd of suggested clipSimply connect the pressure gauge onto either as a supplier return side and then connect theMoreSimply connect the pressure gauge onto either as a supplier return side and then connect the provided end cap on the other side. Using compressed air fill the system up to 60 to 75 psi.

How long will radiant heating last?

Claim your home to stay up-to-date of your home's value and equity. In-floor radiant heat systems are durable and reliable, capable of outlasting your home furnace. With proper care and maintenance, a floor heating system can last up to 35 years. It can save money, too.

Why is one zone of my heat not working?

Bleed the Radiators Sometimes, a heating zone will not work properly because water cannot move through the baseboard radiators. This happens when an air bubble blocks the pipes. To help draw out air, locate the bleeder valves on all the radiators in the affected heating zone.

Why is my underfloor heating not warm enough?

Although generally highly reliable, there are many reasons your underfloor heating could be malfunctioning. These problems can include anything from incorrect setup to incompatible external components, such as flooring, or something as simple as trapped air in the pipes.

How do I reset my underfloor heating thermostat?

0:020:37Reset your Heatmiser Slimline Thermostat - YouTubeYouTubeStart of suggested clipEnd of suggested clipIf you wish to restore all settings back to the factory default firstly turn the thermostat off byMoreIf you wish to restore all settings back to the factory default firstly turn the thermostat off by holding the power button for three seconds.

Can underfloor heating get blocked?

Air in the system: Like with radiators, air can get trapped in the underfloor heating loop. The means of removing the air sounds, but it is as simple as pushing any blockage through a pipe.

How long should underfloor heating last?

50 yearsThe running costs are generally far lower for UFH than radiators. It's worth noting too that underfloor heating systems have a lifespan of 50 years plus, while the average radiator will only last between 8-12 years before becoming inefficient.

How can I tell if my underfloor heating pump is working?

When the system is running check that water is running through the flow meters on the flow manifold. If there is no water coming through the flow meters, then you have air in the system. If the pump is not running, check that the electrician has wired it in correctly (see our manual). This is a common problem.

What is radiant heating?

Radiant floor heating can provide many advantages over traditional furnaces and boilers. The home heating system, which uses panels under your floor to distribute warm air through your rooms, heats homes more evenly and efficiently than most conventional forced-air or radiator-based setups. Of course, like any component of your heat and air conditioning system, radiant floor heating can break down from time to time and require maintenance and repair. Read on to learn some common signs of trouble in your radiant floor heating and what steps you should take to remedy them.

What to do if floor heating system isn't working?

If your floor heating system isn't keeping your home at your desired temperature, the first place to check is not within the heat and air conditioning system itself. Rather, you should make sure you haven't introduced outside factors that can degrade the heater's performance. For example, if you recently redecorated your home, be aware that heavy carpets and large amounts of furniture can soak up and block the heat, preventing the air from being as warm as you want it to be.

Can you adjust the temperature of a water heater?

If your floor heating still isn't providing the warmth you’re looking for, there are a few other steps worth trying. Homeowners who have water-based floor panels can adjust the temperature of the hot water heater up or down to try to hit the sweet spot. If you like your showers hotter than your floor heat, you can also install a mixing valve to keep the floor from heating up too much.

6 Most Common Radiant Floor Heating Problems and How to Solve Them

Radiant floor heat has existed for millennia. It was originally constructed by ancient Chinese engineers, built upon by ancient Roman inventors, and popularized in recent decades as a fixture in many homes and commercial spaces as an energy efficient, gentle heat source.

Troubleshooting Your Radiant Floor Heat System

Identify your radiant heat source: If you aren’t the one who installed the system (i.e. if you purchased it already installed from the previous homeowner) identify what kind of radiant heat your space uses. Each type of radiant heating system has a different potential host of issues.

Electric Radiant Heating Systems Common Issues

A thermostat is a valuable component of electrical radiant heat. Because electrical is the least efficient radiant heat source, a thermostat is essential in reducing costs by making sure it’s only utilized when needed. However, it’s also the most common malfunction in the electric radiant system.

Hydronic Radiant Heating Systems Common Issues

Zone valves work to move water from your boiler to your under-floor heating system. When they malfunction (whether due to time-related wear or faulty installation), water flow can be inconsistent or even halt altogether, causing unpredictable radiant heat function.

What happens if a hot water tank mixing valve malfunctions?

If it malfunctions, it can lead to insufficient heating, or heating that is so high it begins to damage the floor material (see above).

Can you do it yourself with radiant heating?

Call for Professional Repairs. You should definitely avoid do-it-yourself techniques with radiant floor heating. If you try to rip up wood floors or stone floors to get at the piping, you will most likely do further damage, both to the floor and to the heating system.

Can radiant heat leak?

Sealing leaks: Any hydronic system is susceptible to leaking, and radiant floor heating is no different. The closed-loop copper or PEX tube system of radiant floor heating makes them highly resistant to corrosion—but not damage from outside stress such as sagging floorboards and cracked stones.

Is radiant floor heating good for a new home?

Having radiant floor heating installed in your house is a great way to get effective and energy-efficient warmth. Radiant heating systems are especially good ideas for new home construction, but existing homes can also be retro -fit to enjoy their many benefits.

What is the first step in troubleshooting a radiant floor heating system?

Looking to the thermostat is usually the first step when troubleshooting a radiant floor heating system, as it is the most common source of problems. The thermostats that control the zone valves in a hydronic radiant floor heating system are usually low-voltage thermostats.

How does radiant heating work?

Radiant floor heating systems work by circulating hot water through polyethylene (PEX) tubing installed within, above or below the subfloor. These systems are relatively simple systems in principle, but they have several mechanical components that can be the source of problems: 1 ​ A boiler ​ (or water heater) heats the water for circulation through the tubing. In most systems, the boiler serves only the radiant floor system, but some systems also use the boiler for domestic hot water used throughout the house. 2 ​ The circulating pump ​ moves water from the water heater through the tubing and back to the water heater. In some designs, there is a separate circulating pump for each heating zone, while in other systems, a single pump pushes water through the entire system. 3 ​ The manifold ​ is a brass and copper array that divides the main hot water line coming from the water heater into individual loops (zones) to heat various rooms. The manifold sometimes integrates the zone valves.

What are the features of a hydronic radiant floor water heater?

The boiler or water heater that serves a hydronic radiant floor heating system has many of the same features as any consumer water heater or boiler: an expansion chamber, pressure gauge, and pressure-relief valve.

Why does my radiant floor not warm up?

When the circulating pump on a radiant floor heating system develops problems, you may notice that the floors do not warm up as they are supposed to, even when the boiler or water heater seems to be working correctly. When a pump fails, it may work only intermittently or stop working at all.

What happens if your thermostat is not sending signals to zone valves?

If these check out but the thermostat is still not sending signals to the zone valves, power is shut off to the system and then the old thermostat is removed and swapped out with a new one that has the appropriate features for the type of hydronic radiant floor heating system you have.

How long does a radiant floor heater last?

If your radiant floor heating system is served by a boiler, 15 to 20 years is an average life expectancy. In most cases, replacing this major component will be a job for a plumbing or HVAC specialist. 2.

What is a manifold on a water heater?

The manifold ​ is a brass and copper array that divides the main hot water line coming from the water heater into individual loops (zones) to heat various rooms. The manifold sometimes integrates the zone valves. Advertisement. Zone valves ​ control the flow of water through different branches of the tubing.

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Step 1 - Inspecting The Radiant Heating System

Step 2 - Identifying The Problem

Step 3 - Repairing Problems

  • Hopefully by now you will have a good idea of the cause of the problem with your radiant heat system. The solution will depend very much on the problem and type of system you have. Look at the relevant sections below to find out how to repair these problems.
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Step 4 - Fixing Water Leaks

  • This section only applies to you if you have a water based system which you suspect is suffering from a leak. Leaking pipes can be very damaging to your entire house which is why it's important to get the problem fixed as quickly as possible. There are a number of different methods of fixing leaks. The easiest and quickest is to use fiberglass resin tape. This is a special type of tape whic…
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Step 5 - Fixing Electrical Problems

  • Electrical problems could be something as simple as a blown fuse, so that's a good place to start. Lift up your flooring so that you can find out exactly what is happening. The most common cause of problems with electrical radiant floor heaters is due to mice and rats biting the wires, causing a short. Start by fixing the problem, and then get rid ...
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