13 August 2018

Electric Heating Elements

Oven Repairs in Port Elizabeth. South Africa

Heating Elements are used in all kinds of appliances. Fridges has them to help defrost excessive ice condensation. Washing machines use an element to heat up the laundry water. Tumble dryers use heating elements to heat up the air that blows through the turning drum and we also use heating elements to make a hot cup of java with a urn or kettle.


Defy bake element

In this post I am going to chat mainly about the elements used in Stoves and Ovens.
 
How do an elements work
Electric current flows through coiled resistance wire - the resistance causes the wire emanates  heat.


How an heating element is made


It is basically electricity passes through a tub.
  • The outer layer is made from copper or stainless steel that holds everything in places
while emanating heat.
  • Insulating layer-  middle part made out of ceramic that conducts heat but not electricity.
insulates the outer layer and resistant wire from each outer.
This white powder is not poisonous but can change the taste of food.
  • Inner section -  Inner section is a coiled resistance wire (made from 80%Nickel & 20% Chromium)
which conducts electricity and generates heat.
Broken defy bake element


Electrical heating elements are made to withstand high temperatures


There are many different elements with various wattage output. Watts (energy) is just a term they use
to describe the current flow(usage). One watt is defined as the current flow of one ampere with
voltage of one volt.
Huh ! don’t worry for the average person this is useless information. Just remember the higher the
watts of your kettle or Urn elements the faster it will boil the water.
Power struggle - Amps Volts and  Ohms in a heated debate


Reasons why Heating Elements fail


  1. Bad ventilation - It is common for people to use aluminum foil or the flat tray that comes with
the oven and slides into the side of the oven as a drip tray. Big mistake! This pan should only
be used with your thermofan settings or in the middle of the oven right underneath the roast.
“But the book says!” I know but trust me on this.


When this tray is positioned at the bottom of the oven just above the bake element, the tray
acts as a barrier by trapping the heat, preventing the heat from reaching the thermostat. In
this trap-barrier the temperature is much higher than that of the top oven section. The
thermostat probe is normally installed in the top section or middle section of the oven
(because hot air rises).


This little boo boo is the single biggest reason why bake elements fail but the manufacturer's
has realised their mistakes and the new spill trays has vent holes on the sides so the hot air
can rise.


  1. Overheating -   Due to bad Thermostat control (not the same as when you have poor ventilation
as described above). Severe overheating is normally caused by a thermostat that is busy failing.
The element gets extremely hot before it cools down. Sometimes this extreme heating can cause
deformity on the element, resulting a shorter lifespan of the element.
3. Oven door seal faulty -   a bad door seal will give you a combination of the first two points.

The hot air inside the oven escapes passed the damaged oven gasket. Again because hot air
rises it is very important that you have a good seal on the top section of the oven. Hot air leaking
causes the heating elements to work much harder and longer to maintained preset temperature.


4.Manufacturing - Manufactures are under constant pressure from the east to supply cheaper.
The competition forces them to cut corner by manufacturing with cheaper and  inferior product.Cutting on labor and staff is affecting the end results.
5.General operating errors

Overused - Domestic stove and oven elements are not the same as and Industrial oven.
Domestic ovens can only be used for unlimited periods of time per day. A household oven maximum working time is between 4 to 5 hours per day.  Using a heating element for extended periods of time at high periods will cause the element to deform and blister.

Spillages -  Elements that get douses with liquids that from a leaking pan could cause
 the element to cool down too fast in sections. This could cause the element too blister and  explode. 

Power fluctuation - Constant high power fluctuation causes small “ding’s” (damages) to  the
resistant wire and electronic components in the oven. This phenomenon is called “Electronic rust”.
When looking at AC power flow on a oscillator-screen one can see the power in waves going up and
down.

The signs of excessive Power fluctuations is the same as one power surge. It is just that the damaged
happened over a time period.

Elements are made to withstand high temperatures. Domestic elements range from 50 degrees to 300
degree Celsius.  


Once switch-on elements go full blast - there is no half heat and that’s why you need a controller like a
thermostat to regulate heat emanation of the element.


If you want more information or would like to add, leave a comment below or send me a email

Happy bakking

www.pinepienaar.info














27 July 2018

Ghd styler Vs power Generator

GHD Repairs in Port Elizabeth. South Africa

Ghd resistors blown

Getting power from a power generator for your Ghd Straightener is never a good idea. I know some ladies want to style their hair even in the Bush or while they are out in the rural area.

It's Ok to use your styler if the power is been filtered through a Pure Sine wave Inverter but tapping directly from the Generator is bad idea. The power fluctuation is just to much for these little Pc Boards.

Ghd electronics are state of the Art!

Most people tend to forget that they are actually holding a very sensitive device in their hand and the unit should be treated with great care.

So next time when you go ruffing it up rather take a cheap battery styler or take your own inverter unit.

Feel free to sent me email or leave a comment below

www.pinepienaar.info
 
 

26 July 2018

Inverter

Appliance Repairs in Port Elizabeth. South Africa

Inverter Repairs


Inverters are the future!

O.K! come back this is not another boring post about something you are never going to use. Inverter's are here to stay and it is going to become a part of every household.

Over the year our National power supplier has work hard to building themselves a reputation as a total unreliable service provider. The municipalities are ripping their paying clients on their power bills to makeup for their inefficiencies.

Oops! You're still here, thanks for sticking around. I just had to get that out my system.
It not only that power suppliers has become totally unreliable but fossil fuel and the damage it does to our environment, has made it a matter of urgency to find an alternative power suppliers.

Why would you ever need a power inverter?

If you’re not a active outdoor camper you might be needing a inverter to watch you favorite soapy on televisions when the power is down. Sick people need inverter's to run their medical equipment in case of a power outage.

Up to this stage the authorities has try everything to discourage people from generating their power. With the anti fossil fuel movement that is growing daily, the world has started to looking  for alternative power source.

Some of the main alternative energy source area;
  • Sun - solar energy threw the use of solar panels converting the sun's heat to electricity
  • Water - perpetual motion is becoming big to harness the oceans waves. Water-turbines has already been in use for many years.
  • Wind - Wind power are very unpredictable and unreliable but if one use it with solar energy if becomes more reliable.

Power inverter is an electronic device that changes direct current (DC) to Alternating Current (AC)
  • Alternating Current (AC) - is electricity that reverse all the time (alternating), it is supplied through a national grid to home and businesses. Appliances like washing machines, microwaves and stoves run on alternating current. Most AC power is supplied in pure sine wave (I will tell you more about sine wave shortly)
  • Direct Current (DC) - is a electric current that flows in one direction. Used in portable appliances like laptops, radios, cameras and touches. The main source of DC power is batteries.
  • Sine Waves - Power has a frequency that can be seen and measure on a oscillator that looks a wave. Human ears can hear pure sine waves. Sine waves just looking at the way they interact with other Waves (devices).
A Modified sinewave is square and tend to cause interferences on other devices.
Your can read more about sine waves here.  

The main takeaway is to remember that if the electric current is not  pure it will cause disturbances on your radio, television and cell phone.

Inverter's have either a modified sine wave (square wave) or pure sine wave output. Now that you know more about the workings and uses of a inverter, I will tell you more where the inverter fits into the alternative power system.

  1. Power Generator Source; - Solar panels, wind and water turbine
  2. Voltage Regulator; - This unit is to regulate the power flow to the batteries
  3. Batteries; - 12 Volt or 24 V DC power
  4. Inverter; - Changes 12 Volt power to 220 Volt

  • Modified sine wave (step square) inverter's has limitations compared to a pure sine wave inverter that can run any type of equipment from oxygen concentrators to variable speed control power tools. are smooth actually very fascinating and one can learn so much from them .

Should you need more info feel to send me a e-mail or leave a comment below.

www.pinepienaar.info


09 July 2018

Damaged Speed Queen toploader washer Transmission output shaft

Appliance Repairs in Port Elizabeth. South Africa

Close up of a Speed Queen washer damaged transmission output shaft 

The above picture shows two transmission (gearbox) of the same aged and same model toploader washers. Water has leaked in the gearbox and the result was that the transmission oil was misplaced. The one on the left is the shaft that worked without oil.

Just shows you one should never underestimate the important of having your washing machine serviced.

What! . . .

Yes! you must have your washing machine serviced reguarly.

2 Transmission output shaft
Feel free to leave a comment below if you should need more advice or info.

www.pinepienaar.info

29 June 2018

GTLH Thermostat Wiring Diagram

Oven and Stove Repairs in Port Elizabeth. South Africa

Most Defy oven and stove use the GTLH thermostat

27 June 2018

Kenwood Chef Food Progessor

Kenwood Chef Repairs in Port Elizabeth. South Africa
Kenwood chef food processor control module


Kenwood Chef Food processor


The Kenwood Chef food processor was first launched at a London show in the year of 1950 by Ken Wood.


It will be unfair to call it just a mixer as it presents with numerous functions thus the referral to it now as a Food-Processor.   


Planetary Action
What makes the Kenwood unique is its planetary action. This means while the beater is revolving in one direction - the socket is turning in the opposite direction. This action makes sure that all the mixtures are pickup from the bowl


The following three bowl tools are the most famous and the ones that get to be used most often.
  • The Wisk; Its balloon shape tool and creates maximum volume. It also mixes in a lot of air to create a fluffy texture. This is perfect for morranges, soflays and mouses.
  • The Dough hook; Ideal for mixing a smooth bread mix. Makes great sweet bakes like buns, doughnuts and pastry.
  • The K-Beater; Mixes my favorite “Fruitcakes” and also sponge cakes. Also great for mixing biscuits and pastry.
Kenwood chef on and off switch

I will tell you more about this great machines in a follow up post right now my cravings is driving me up the wall


Happy Baking (Contact me if you need a tester)
www.pinepienaar.info








PS: If you know who the actual person was who build the first unit - please update us.

18 June 2018

Tea Biscuit recipe

Oven Repairs in Port Elizabeth. South Africa

Tea cookies ready to be baked 

Tea biscuits are simple and easy to make, yet they say so much and taste great! Nothing beats the smell of cookies baking in the oven when entering a Kitchen-artist-home.


Following tea cookie recipe are from Lynn's kitchen-studio


Tea Biscuits


Increadiance


500 ml Cake


125 ml Sugar


5 ml Cream of tartar


1 ml  Salt


2.5 ml Biacarbone of soda


15 ml milk


125 ml Butter


1 egg


5 ml vanilla essence


Thousands or sugar for the toppin.
Defy under-counter oven with trays of cookies

Methort
  1. Preheat oven to 180 degree chelseas
  2. Mix Cake flour, Cream of tartar, salt, and sugar all together in a bowl
  3. Rub butter into above mixture
  4. Dissolve bicarbonate of soda in milk and add to mixture
  5. Mix egg with vanilla and add it to above
  6. Mix all together to form a dough
    1. Spread and roll-out.
    2. Use cookie cutter or glass to make(shape) cookies
    3. Sprinkel the cookies with thousands or sugar
  7. Bake for 10 to 12 minutes

ENJOY!

www.pinepienaar.info

30 May 2018

Kitchen Artist

Oven Repairs in Port Elizabeth. South Africa

 Defy Stove Model DSS445 selector switch

Kitchen-Artist is a person engaged in an activity related to creating art in the kitchen. They practice the arts by using various tools and substances in a combination to create "taste-art". 
Selector switch burned contacts

The Taste-magic is only a moment - then its Gone

The visual results created by the Everyday-Kitchen-Artists are most of the times beyond words and one can never  truly describe the magic sensation that happen with your taste-buds.
Defy stove selector switch view from the top
We love talking about ovens because this is the place the magic starts. Its an honored to be associating with some of Port Elizabeth's Best "Kitchen-Artists".
www.pinepienaar.info

17 April 2018

Defy 731 Stove thermo fan

Stove Repairs in Port Elizabeth. South Africa

The Defy Stove Model 731 is still one of the best Multi-function stove, it is sought after by domestic caterers and weekend chefs alike. The big oven makes big  catering orders a breeze and the weekend chef can created huge succulent roast for their family and friends.

Inside Defy stove oven with Thermo fan cover removed 

The Thermo fan function is a great energy saver while giving magnificent baking results with the heat sources (heating elements) coming on less frequently to produce a even hot air flow in the oven.

Now the reason for this post is tell you more about the Thermo-fan in the oven and quick a way of spotting when fan is busy failing.

  • One of the many great features of the Thermo-oven is that you can bake on all the shelves and the baking result will be consisted. Once you start noticing different shades of brown on the cookies or the potato-bake is a bit sloppy on one-side, then you know the fan are no longer distributing the hot-air effectively and evenly 
  • The oven is getting hot but no air is blowing inside the oven or
  • The fan is blowing but it sounds like a Boeing is taking-off inside the oven 
  • If the oven-door are closing properly and the oven seal are not broken but the baking results aren't up to pare - then it could only be the fan becoming slower and weaker


Defy stove broken thermo fan and neutral wire

Once the temperature start going haywire and the oven is playing up clients also start noticing that their oven doors aren't that hot. Don't worry about this it is just another great feature of the Defy 731 - it has a Air cooled oven door.

The Oven-door has little air-slots in the door that when the hot air starts to rise, it pulls cold air from the bottom though the double oven door glass. This constant flow of  fresh air  movement keep the door cool while keeping the hot-thermo-air inside.

I better stop raving about the Defy 731 stove because you might think I am getting paid for this post but it's just that I love with this simple looking stove with all her hidden features!

There is so much more I can tell you about  this amazing-beautiful-easy-to-operate-oven. Feel free to send me an e-mail and we can chat for hours about oven creations.

Happy Baking!
www.pinepienaar.info








PS. Disclaimer; We are not receiving any money for this post)


03 April 2018

Drain Pumps

Appliance Repairs in Port Elizabeth. South Africa

Drain pumps are used in Washing Machines, Dishwashers, Ice-machines and other small domestic appliances to drain water out of appliances
Universal Drain Pump
There are many different types of Drain Pumps but the most common type that is used in Domestic appliances are the Induction motor and Magnetic Type

Induction Pump Motor

The main feature of this motor is that the impeller turns around in 360 degree circles to expel the water. (Impeller is the little blades in a rotating sharft that scoops water in a direction) This type of motor-action is ideal for a very powerful pump to drain water fast.
The negative 
Because this motor only turns in one direction it is so much easier for everyday articles like; hairpins, nails coins and curtain hooks to lodge themselves between the pump-blades. When the pump impeller cannot turn the motor overheats and burnout.

Magnetic Pump

This pump motor drains the laundry water by vibrating the impellers - there is no turning action. Its much harder for something to lodge inside the pump and impeller-blades because of this vibrating-action.
The Negative
The magnetic pump motor has a shorter operating life compare to the induction pump motor.

Signs of a Faulty Drain Pump Motor


  • Water left behind after completig washing cycle
  • Laundry is still wet after spinning
  • Water drain during rinse cycles but once it gets to finale rinse the pump is all heated up and then it does not want to drain.
Quick test;  Drop the outlet/drain-hose flat on the ground if water doesn't run out there is a blockage somewhere in the outlet system

If the water flows out freely then the pump is on the Blink

Hope this information will help you diagnose your appliances, feel free to contact me if you should need more.

Cheers!
www.pinepienaar.info