What's The Difference Between Pex A And B

Let's face it: home appliances break down. One common culprit is the dishwasher. If your dishwasher isn't cleaning properly, or not working at all, it can be frustrating. Before calling a repair technician, let's run through some basic troubleshooting steps. Remember, safety first! If you are uncomfortable with any of these steps, or if you suspect a major issue involving electricity or gas, please call a qualified professional.

Troubleshooting Your Dishwasher: A Step-by-Step Guide

This guide will help you systematically diagnose and potentially fix common dishwasher problems.

Step 1: Check the Power Supply

This is the simplest and most often overlooked step. Before doing anything else, confirm the dishwasher is receiving power.

• Check the Circuit Breaker: Locate the circuit breaker that controls your dishwasher in your home's electrical panel. Ensure the breaker is in the "ON" position. If it's tripped (in the "OFF" or middle position), flip it to the "OFF" position first, then back to the "ON" position.
• Test the Outlet: If the breaker wasn't tripped, use a voltage tester or try plugging another appliance into the dishwasher's outlet to verify it's working. If the outlet isn't providing power, you may have a wiring issue that requires a qualified electrician. Do not attempt to fix electrical wiring yourself if you are not trained.

Step 2: Inspect the Water Supply

A dishwasher needs water to function. Ensure the water supply valve is open and that there are no kinks in the water supply line.

• Locate the Water Supply Valve: This is usually located under the sink, near the dishwasher. Make sure it's fully open.
• Check the Water Supply Line: Inspect the line running from the valve to the dishwasher for any kinks or bends that could restrict water flow. Straighten any kinks you find. If the line is damaged, it will need to be replaced by a qualified plumber.
• Check the Float Switch: Inside the dishwasher, near the bottom, is a float switch. This switch prevents the dishwasher from overfilling. Make sure it moves freely and isn't stuck in the "up" position. Clean around the float switch if necessary.

Step 3: Review the Dishwasher Settings

Sometimes the problem isn't mechanical, but a simple user error. Double-check your settings.

• Cycle Selection: Ensure you've selected the correct wash cycle for the load. A delicate cycle won't clean heavily soiled dishes effectively.
• Start/Cancel Button: Make sure the cycle has actually started and hasn't been accidentally cancelled.
• Delay Start: Check if the delay start function is activated. If so, the dishwasher won't start immediately.

Step 4: Clean the Filters

Clogged filters are a common cause of poor cleaning performance. Always disconnect power before cleaning the inside of your dishwasher.

• Locate the Filters: Dishwasher filters are typically located at the bottom of the dishwasher, near the spray arm. Refer to your owner's manual for specific instructions on how to remove them.
• Clean the Filters: Rinse the filters thoroughly under running water, removing any food debris. Use a soft brush to scrub away stubborn residue.
• Reinstall the Filters: Make sure the filters are properly reinstalled according to the manufacturer's instructions. Incorrect installation can damage the dishwasher.

Step 5: Inspect the Spray Arms

Spray arms distribute water throughout the dishwasher. Clogs can prevent them from spinning and cleaning effectively. Disconnect power before working on the spray arms.

• Locate the Spray Arms: Dishwashers typically have one or more spray arms, located at the top, middle, and/or bottom of the dishwasher.
• Check for Clogs: Inspect the spray arm nozzles for clogs. Use a toothpick or wire to carefully remove any debris.
• Ensure Free Rotation: Make sure the spray arms can rotate freely. If they are obstructed, remove the obstruction or replace the spray arm if it's damaged.
• Properly Secure Spray Arms: If your spray arms are screwed on, ensure the screw is secure but not overtightened.

Step 6: Check the Door Latch and Switch

The dishwasher won't start if the door isn't properly latched. Disconnect power before checking the door latch or switch.

• Inspect the Latch: Make sure the door latch is engaging properly and that the door is closing securely.
• Test the Door Switch: The door switch signals to the dishwasher that the door is closed. You can usually find the door switch on the frame of the dishwasher where the latch engages. Check the switch for any signs of damage. Use a multimeter to test the switch's continuity when the door is closed. If the switch is faulty, it will need to be replaced. Replacing a door switch involves electrical work and should be done by a professional if you aren't comfortable with it.

When to Call a Professional

While many dishwasher problems can be resolved with simple troubleshooting, some issues require the expertise of a qualified appliance repair technician. Call a professional if:

• You suspect an electrical problem (e.g., burning smell, sparks).
• The dishwasher is leaking water, especially if you can't identify the source.
• The motor is making unusual noises.
• The dishwasher is not filling with water.
• The heating element is not working (dishes are not drying). Testing and replacing a heating element can be dangerous and is best left to a professional.
• You've tried the troubleshooting steps above and the dishwasher still isn't working.

Understanding PEX Tubing: A vs. B

If your dishwasher repair involves replacing any water lines, you may encounter PEX tubing. PEX (cross-linked polyethylene) is a popular choice for plumbing due to its flexibility, durability, and ease of installation. However, not all PEX is the same. The two main types are PEX-A and PEX-B.

PEX-A: The Flexible Option

PEX-A is known for its exceptional flexibility. It's made using a method that creates the highest degree of cross-linking, making it the most flexible of the PEX types.

• Flexibility: PEX-A is the most flexible type of PEX, making it easier to bend and maneuver in tight spaces.
• Expansion: It can be expanded to fit over fittings using the expansion method, which creates a very strong and reliable connection.
• Kink Repair: Kinks in PEX-A can often be repaired with a heat gun, restoring the tubing to its original shape. However, repeated kinking and heating will weaken the pipe.
• Cost: Typically the most expensive type of PEX.
• Fittings: Requires special expansion tools and fittings for expansion connections. Can also be used with cinch clamp or compression fittings.

PEX-B: The Stiffer Alternative

PEX-B is manufactured using a different method that results in a stiffer tubing. It's more common and generally more affordable than PEX-A.

• Stiffness: PEX-B is less flexible than PEX-A, making it more prone to kinking.
• Connections: Primarily uses cinch clamps or compression fittings to create connections.
• Kink Repair: Kinks in PEX-B are generally not repairable. The tubing will need to be replaced.
• Cost: Generally less expensive than PEX-A.
• Fittings: Uses readily available cinch clamps or compression fittings.

Key Differences Summarized

Here's a quick comparison to help you understand the key differences between PEX-A and PEX-B:

Which PEX Should You Use?

The best choice depends on your specific application and budget. For tight spaces and situations where flexibility is crucial, PEX-A is the preferred option, despite its higher cost. For straight runs and more straightforward installations, PEX-B offers a cost-effective alternative. Both types are suitable for hot and cold water lines in residential plumbing systems. Consult local plumbing codes to ensure compliance with regulations.

Important Note: While PEX-A and PEX-B can be used in the same plumbing system, it's essential to use the correct fittings for each type of PEX. Mixing fitting types can lead to leaks and plumbing failures. If unsure about the proper fittings or installation techniques, consult a qualified plumber.

By following these steps, you can confidently troubleshoot common dishwasher problems and even understand the difference between PEX tubing types for future plumbing projects. Remember to prioritize safety and seek professional help when needed!