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8145 20 Defrost Timer Wiring Diagram: A Comprehensive Guide
Author: Robert Miller, Certified Appliance Repair Technician with 20 years of experience specializing in refrigeration systems and defrost cycles.
Publisher: Appliance Repair Central, a leading online resource providing DIY repair guides and technical information for household appliances. We are committed to providing accurate and up-to-date information for homeowners and technicians alike.
Editor: Jane Doe, experienced technical editor with a background in engineering and a proven track record of creating clear, concise, and accurate technical documentation.
Keywords: 8145 20 defrost timer wiring diagram, defrost timer wiring, refrigerator repair, appliance repair, troubleshooting, wiring diagram, 814520, defrost cycle, refrigeration system
Summary: This comprehensive guide provides a detailed explanation of the 8145 20 defrost timer wiring diagram. It covers understanding the components, troubleshooting common problems, safe wiring practices, and avoiding pitfalls during installation or repair. We also delve into best practices for ensuring the longevity of your defrost system.
Understanding the 8145 20 Defrost Timer Wiring Diagram
The 8145 20 defrost timer is a crucial component in your refrigerator's defrost system. Its primary function is to control the heating element and defrost drain, ensuring efficient defrosting and preventing ice buildup. The wiring diagram itself is a visual representation of the electrical connections within the timer. Understanding this diagram is essential for proper installation, troubleshooting, and repair. A typical 8145 20 defrost timer wiring diagram will show the connections for:
Power Input: This is where the main power supply connects to the timer.
Compressor Run: This terminal controls the operation of the refrigerator's compressor.
Defrost Heater: This terminal energizes the defrost heating element, melting the ice buildup.
Defrost Thermostat: This terminal connects to the defrost thermostat, which senses the temperature and signals when defrosting is complete.
Defrost Drain Heater (if applicable): Some models include a drain heater to assist in melting ice in the drain line.
Timer Motor: This terminal provides power to the timer's motor, enabling the cycling of the defrost process.
Common Components Shown in the 8145 20 Defrost Timer Wiring Diagram
The 8145 20 defrost timer wiring diagram will typically highlight several key components:
The Timer itself: This is the central component, responsible for sequencing the defrost cycle.
The Defrost Heater: This resistive heating element melts the frost accumulation.
The Defrost Thermostat: A temperature sensor that signals the end of the defrost cycle.
The Compressor Relay (if applicable): This might be integrated into the timer or a separate component. It controls the compressor's operation.
The Drain Heater (if applicable): A small heating element located near the drain to prevent ice blockage.
Troubleshooting Common Issues Using the 8145 20 Defrost Timer Wiring Diagram
Many refrigerator problems stem from malfunctions in the defrost system. The 8145 20 defrost timer wiring diagram becomes critical in troubleshooting. Common issues and their possible causes:
No Defrosting: Check the power supply to the timer, the defrost thermostat, and the defrost heater using a multimeter. A faulty timer, thermostat, or heater could be responsible. The wiring diagram helps trace these connections.
Constant Defrosting: This could indicate a faulty defrost thermostat, constantly signaling for defrost. The wiring diagram helps pinpoint the thermostat's connection for testing and replacement.
Compressor Not Running: This issue might be related to the compressor relay, if it’s integrated into the timer. The diagram shows the relay's position and connectivity.
Intermittent Defrosting: This could be due to a failing timer motor, worn-out contacts within the timer, or problems with other components connected in the circuit. Carefully examining the wiring diagram helps identify the source.
Best Practices for Working with the 8145 20 Defrost Timer Wiring Diagram
Before working on any electrical appliance, always disconnect the power supply. This is crucial for safety. When referring to the 8145 20 defrost timer wiring diagram:
Use a multimeter: This allows you to test the continuity of wires, resistance of the heating elements, and voltage at various points.
Trace the wiring carefully: Follow the diagram and the wires systematically to avoid mistakes.
Use appropriate tools: Having the right tools, including screwdrivers, pliers, and wire strippers, is essential for a safe and efficient repair.
Take clear photos: Before disconnecting anything, take photos to help you remember the wiring configuration.
Consult a professional: If you're unsure about any step, consult a qualified appliance repair technician.
Common Pitfalls to Avoid When Using the 8145 20 Defrost Timer Wiring Diagram
Incorrect wire connections: Make sure to connect the wires according to the diagram's color codes and terminal markings. Incorrect connections can lead to damage or malfunction.
Overtightening screws: This can damage the timer or other components. Tighten screws firmly but avoid over-tightening.
Ignoring safety precautions: Always disconnect the power supply before working on the appliance.
Using incorrect replacement parts: Ensure you use a genuine replacement part that's compatible with your specific model.
Improper grounding: Ensure the appliance is properly grounded to prevent electrical shocks.
Conclusion
The 8145 20 defrost timer wiring diagram is a vital tool for understanding and repairing your refrigerator's defrost system. By understanding the diagram, employing safe practices, and avoiding common pitfalls, you can successfully troubleshoot and repair common issues. Remember to prioritize safety and always disconnect the power before working on any electrical appliance. If you lack experience, seeking professional help is always the best course of action.
FAQs
1. Where can I find the 8145 20 defrost timer wiring diagram? You can often find this diagram within the appliance's service manual or online through appliance parts websites.
2. What tools do I need to work with the 8145 20 defrost timer? You'll need screwdrivers (Phillips and flathead), pliers, wire strippers, and a multimeter.
3. How can I test the defrost heater using the diagram? Use a multimeter to check the resistance of the heater. The diagram will show where the heater connects.
4. What does it mean if my defrost timer is constantly running? This could indicate a faulty defrost thermostat. Check its continuity and replace it if necessary.
5. Can I replace the 8145 20 defrost timer myself? Yes, but it requires some electrical knowledge and care. Disconnect power first!
6. What if I can't find a replacement 8145 20 defrost timer? You may find a compatible substitute, but ensure it's electrically compatible.
7. Is it safe to work on a refrigerator's electrical system? Only if you are properly trained and understand electrical safety procedures. Otherwise, call a professional.
8. My refrigerator is still not working after replacing the timer. What could be wrong? Other components may be faulty; check the defrost thermostat, heater, and compressor.
9. How often should I expect to replace the 8145 20 defrost timer? This depends on usage and maintenance; it can last for many years but can wear out eventually.
Related Articles
1. Troubleshooting Refrigerator Defrost Problems: A guide covering common defrost issues and their solutions.
2. Understanding Refrigerator Compressor Operation: An explanation of how the compressor works and its role in the cooling cycle.
3. How to Test a Defrost Thermostat: A step-by-step guide on testing a defrost thermostat with a multimeter.
4. Refrigerator Repair Safety Tips: Emphasizing safety measures before attempting any repair.
5. Identifying Refrigerator Model Numbers: A guide on how to locate the model number of your refrigerator.
6. Replacing a Refrigerator Defrost Heater: A detailed guide for safely replacing a faulty defrost heater.
7. Understanding Refrigerator Wiring Diagrams: A general guide on interpreting wiring diagrams for refrigerators.
8. Common Refrigerator Repair Mistakes to Avoid: Highlighting potential mistakes and how to prevent them.
9. Finding and Using Appliance Repair Manuals: A resource guide explaining where to find manuals and how to use them effectively.
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in refrigeration cycle operation, and change position upon initiation of a defrost. Step-by-Step Guide: Paragon 8145-20 Defrost Timer Wiring Freezer Service Manual Defrost events should …
Commercial Refrigeration Basics - waterheatertimer.org
Defrost Control Concept • Defrost Control – Prevents build of frost or ice – Heat output is provided by electric or hot gas defrosts • Defrost can occur manually or automatically • Defrost include …
Intermatic-Defrost-timers-and-manuals.html Installation
value as set on the Paragon defrost timer being replaced. Set cut-out 6 to 14 psi below cut-in. See wiring diagrams 2 and 7. F 3 1 2 4 N X F 3 1-N 2 4 Xp p N 1 3 2 4 Xp p N 1 3 2 4 X 1 N 3 4 2 X …
WIRING DIAGRAM - ICM CONTROLS
DEFROST TIMER WIRING DIAGRAM SPECIFICATIONS Input • Voltage: 18-30 VAC • Frequency: 50-60 Hz • Power Consumption: 1 watt maximum Output • O, W2: – Type: Relay – …
DTAV40 Series - coburns.com
The defrost timer shall be housed in a UL Type 3R indoor/outdoor plastic enclosure or UL Type 1 metallic enclosure. The relay output will be rated for 40A Resistive, 2 HP @ 240 VAC. Defrost …
defrost timers - insco.com
8145-AV50 8145-AV50M Auto Voltage Defrost Timer in Metal Casing, 50 Hz Auto Voltage Defrost Timer Mechanism Only, 50 Hz 40 Amps Resistive 120-240V AC 3 HP Motor 240V AC 1.5 HP …
THEM ALL) DTAV40-M 8041-00 Defrost Timer, 120V (Closed, …
8141-20 Defrost Timer, 208-240V (C, O, C), Remote Temp or Pressure Terminated 8143-20 Defrost Timer, 208-240V (O,C,O),Remote Temp or Pressure Terminated 8145-20 Defrost …
How to test Paragon 8145-20 defrost timer.
8145-20 defrost timer. Timer dial should rotate continuously, and keep good time. Trippers are attached to edge of dial. When trippers reach the trip switch, the timer relay turns on and …
WIRING DIAGRAM - ICM CONTROLS
WIRING DIAGRAM 24 VAC Outdoor Fan Compressor COM NC High temperature and pressure limit switch T’stat “Y” To T’stat “L” From T’stat “O” Reversing Valve Heat Contactor R W2 RV O …
DTMV40 Time Initiated, Temperature, Pressure or Time …
DTMV40 Time/Temp.–Electric Defrost Wiring iagram 8145 Replacement 5 Mode A - No Label Required THERMOSTAT THERMOSTAT COMPRESSOR OR SOLENOID VALVE OR …
Timers - extant.gr
Wiring Diagram Models 8145-00, 8145-20 and E357-00 - Wiring Diagram Wiring using 120V or 240V single phase line with compressor thermostat closed during defrost. ... available to fi t in …
Universal Electronic EDT11 DEFROST TIMER EDT21 - Baker Dist
DEFROST TIMER Universal Electr onic 3/4 H.P. 12-4609 and 12-9282. ... four-wire adapter harness kit if needed. Wire harness lead 1 to No. 3 of the original wiring, lead 2 to No. 4, lead 3 …
Installation & Operating Instructions DTAV40 Series Time …
replace the Paragon 8240 series pressure terminated defrost timers. Defrosts will be initiated by programming the timer, which will accept from 1 to over 24 defrost initiation settings per day at …
Paragon digital defrost timer wiring diagram
Paragon digital defrost timer wiring diagram ... Defrost Timer – Mechanism Only Initiate 15 Minute Manual Defrost Specifications Input Power 120/208–240 VAC 60 Hz (+10, -15%) Power …
WIRING DIAGRAM - ICM CONTROLS
DEFROST TIMER SPECIFICATIONS Input • Voltage: 18-30 VAC • Frequency: 50-60 Hz • Power Consumption: 1 watt maximum Output • O, W2: ... • Low cost time and temperature defrost …
Installation and Table of Contents Operation Manual
properly connected according to the wiring diagram. (e) The factory installed wiring must not be changed ... 25' 2' 20' 3' 40' 3' 40' 6' NOTE: Leave space equal to unit height between bottom of …
defrost timers
8145-AV50 8145-AV50M Auto Voltage Defrost Timer in Metal Casing, 50 Hz Auto Voltage Defrost Timer Mechanism Only, 50 Hz 40 Amps Resistive 120-240V AC 3 HP Motor 240V AC 1.5 HP …
WARNING Table 1. Applicable Defrost Controls - AC Pro
The defrost control includes the combined functions of a time/temperature defrost control, defrost relay, time delay, diagnostic LEDs, and a terminal strip for field wiring connections. The control …
1970 Chevelle Wiring Diagram (Download Only) - x-plane.com
explore and download free 1970 Chevelle Wiring Diagram PDF books and manuals is the internets largest free library. Hosted online, this catalog compiles a vast assortment of …
