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Question posted by cpeter5 on July 27th, 2014

Maytag Microwave Mmv4205ba Runs,no Heat,'hvt' Fuse Blows(there Are 2 Fuses)

Maytag MMV4205BA Ran, no heat and "HVT" fuse blows very quickly (there are two fuses) Replaced shorted cap w/used - within .02uf, w/ matching diode. Days later, low power; "HVT" fuse not full voltage at both ends (weird). 1 month later; ran, no heat. I removed control panel, tried for at least 5 minutes to heat a coffee, "Main" and "HVT" fuses 120v both ends. So I replaced the panel and left for work. Cooking attempts were made, lights/power/display quit. Found "Main" fuse blown. Next test, the "HVT" blew in a few seconds. I moved mw to bench and tested using an old Triplett 630-PLK type 6 w/ two batteries (one is 30v), and a Radio Shack 22-221 (analog). MAG filament; 0 ?. Filament to chassis; ? CAP; R/S - 200k to ? both ways. Triplett (x100k range) - near 0 to 9000k (both ways). DIODE; Triplett (x100k range) 85k one way, ? other. HVT Filament winding - 0 ?. Filament to chassis - ? . Secondary - R/S; 350?, Triplett; 500? (mw paper says "Approx. 90?). Primary; This has three wires at primary; blk, wh, and a blue between them. Apparently the blue's tapped in the middle for "low" power? It goes through the "HV" fuse to a relay that has the other wire white.then trips "protection" button after varying amounts of time from instantly to 10 seconds or more. I tried leaving the R/S meter attached (set to 5vdc - it's lowest range) to see if there was voltage somehow being induced and tripping the protection, and the needle did move a tiny bit. The original fuses were "BUSS MDA 20A", replacements were "BUSS ABC 20A", after running out, I'm using 20 amp glass fuses - could it be it just needs the correct "time delay", or "slow blow" fuses? Though my ohms readings are mostly "off", online info says testing the HV components is best done by replacing with "known good" parts - are there ways I can run mw with certain things disconnected to pinpoint the problem (without electrocuting myself)? I couldn't find info on the three-wire primary until I searched "inrush relay" (one of three relays shown in schematic). Could I try (for example) disconnecting the primary wires, run cook cycle, then introduce 120v to the black & white or blue & white terminals with a separate cord? Wouldn't this eliminate problems in switches, relays, etc. that occur only under load? Any ideas would be appreciated.

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Related Maytag MMV4205BAS Manual Pages

Use and Care Manual - Page 1

DE68-03143G A/08/05 Part No.8112P296-60 Code No. Form No. Over The Range Microwave Oven Use & Care Guide Model MMV4205BA IMPORTANT SAFETY INSTRUCTIONS 2 Precautions to Avoid Possible Exposure to Excessive Microwave Energy 4 Getting The Best Cooking Results 6 Features 7 Operating Instructions 9 Cooking Utensils 22 Care and Cleaning 23 Troubleshooting 25 Warranty 28 Guide d'...

Use and Care Manual - Page 2

... on oven wattage. CAUTION CAUTION - Fat could expand quickly and cause container or bag to cover all possible conditions and situations that are not intended for microwave use . ...or call: Maytag ServicesLLC Attn: CAIR® Center P.O. Keep sales receipt and/or cancelled check as proof of microwave energy on pacemaker. WARNING WARNING - Use only popcorn in oven. 8. Do...

Use and Care Manual - Page 3

...and grounded. Do not use an extension cord. When the oven is the responsibility of electric shock by one or more and fuses can be grounded. of the following: Microwave operates on a circuit with...shown in strict The plug must not be altered. If the product power cord is too short, have a qualified electrician install a three-slot However, there is in interference to correct ...

Use and Care Manual - Page 4

... adjusted or repaired by anyone except properly qualified service personnel. door (bent), 2. D. Do not use straight-sided containers with the door open since open door operation can result in the microwave oven for a short time before and halfway through heating it is not always present. It is no damage to stand in harmful exposure to...

Use and Care Manual - Page 5

... 5 DO NOT use . d. If materials inside the oven to heat, cook, or dry food. IMPORTANT SAFETY INSTRUCTIONS WARNING When using oven. 2. Special tools are placed inside the oven ignite, keep oven door CLOSED, turn the fan on oven. 14. DO NOT cover or block filter or other combustible materials are required to excessive microwave energy. 1. DO NOT heat baby bottles...

Use and Care Manual - Page 6

.... • Shield, with small pieces of aluminum foil, parts of food that may cook quickly, such as chicken pieces or salmon steaks, with the thicker, meatier parts toward the center ...heat evenly and speed cooking. Getting The Best Cooking Results To get the best results from your microwave oven, read and follow the guidelines below. • Storage Temperature: Foods taken from the microwave...

Use and Care Manual - Page 8

... 13 for more information. 8. BEVERAGE: Touch this pad to heat beverage. LESS(1): Touch this pad to stop the oven or to subtract the cooking time. See page 19 for more... information. 6. If you time of day, cooking time settings and cooking functions selected. 2. NOTE: • TURNTABLE ON/OFF is not available in your microwave oven. LIGHT TIMER: Touch this pad to...

Use and Care Manual - Page 9

... LOW setting to cool the oven. NOTE: • If the temperaature gets too hot around the microwave oven...MICROWAVE OVEN This section introduces you to the basics you will hear beeps and END will display. Please read this occurs, the vent cannot be turned off for AM. 5. CAUTION • To avoid risk of personal injury or property damage, do not run the oven empty. 9 Enter the time by using...

Use and Care Manual - Page 10

... to turn off. 5. The oven begins cooking and display shows time... you want the LIGHT to prevent the microwave from being accidentally started or used by children. Touch ADD 30 SEC. The...pad more than 3 seconds. Enter the time you quickly set ADD 30 SEC. Touch ENTER/ START pad. ... cook for 2 minutes at the same time every day until reset. Enter the power level. 5. Touch LIGHT...

Use and Care Manual - Page 12

...MICROWAVE OUTPUT 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% USE • Boil water. • Cook ground beef or begin cooking roasts. • Make candy. • Cook fresh fruits and vegetables. • Preheat browning dish. • Reheat beverages. • Bacon slices. • Reheat meat slices quickly...and cream cheese. • Heat small amounts of microwave power you are cooking. Operating...

Use and Care Manual - Page 13

Pop only one to complete cooking. Recommended amounts: 3.0-3.5 ozs. CAUTION • DO NOT leave microwave oven unattended while popping corn. • When popping commercially packaged popcorn,remove the rack from the oven; Choose number of potatoes (1-6). 3. per each ). potato. • Use the More(9)/Less(1) pads if cooking larger or smaller potatoes. • Before baking, pierce...

Use and Care Manual - Page 14

... one microwave-only bag of bacon. 1. Let stand 3-5 minutes. Let oven cool for at least 5 minutes before using again. Cover with care. Let oven cool for at least 5 minutes before using again. Use More(9) pad when cooking dense vegetables such as carrots or broccoli spears. Note: • Beverage heated with the beverage feature may be very hot...

Use and Care Manual - Page 15

...(9)/Less(1) pads to fit your temperature preference. • Allow food to stand 1 to 6 oz. If food is not as hot as you prefer after heating with REHEAT, continue heating using time and power. Stir foods once before serving. 15 Cover plate with lid or vented plastic wrap. Contents: - 3-4 oz. Contents: - Touch Reheat pad...

Use and Care Manual - Page 17

...stand 1-2 minutes. 17 Soften Cream Cheese 1 package (8 oz.) • Unwrap cream cheese and place on microwave-safe dish. • Let stand 1-2 minutes. Melt Butter 1 stick (1/4 lb.) • Remove wrapping ...butter in a microwave-safe dish. • Stir well at half time when the oven beeps, and re-start the oven. • Unless stirred, the chocolate keeps its shape even when heating time is ...

Use and Care Manual - Page 18

...cheese. • Contents: - 2 cups tortilla chips - 1/3 cup grated cheese • Use pre-cooked, refrigerated chicken wings. • Place chicken wings around plate. • Sprinkle with bacon, onions... and cheese. Operating Instructions SNACKS SNACKS lets you heat 4 categories of skin. • Place skins in spoke fashion around plate in spoke ...

Use and Care Manual - Page 19

... food weight. Available weight ranges are nearly defrosted. Example: To defrost 1.2 lbs of microwave oven. 2. NOTES: • After you extra space when cooking in the refrigerator. Remove ...the four plastic supports when used. • Use the rack only when cooking food on floor of the oven. Remove giblets before freezing poultry. DEFROST TIPS • When using AUTO DEFROST, the weight...

Use and Care Manual - Page 20

... until juices run clear and meat near the bone is no longer pink. Cover with wax paper. Cook until juices run clear and ... Medium Well Done Medium Well Done Dark meat Light meat Remove from oven 135°F 150°F 160°F 150°F 160°...for Cooking Poultry in Your Microwave • Place poultry on dish, with wax paper to prevent spattering. • Use aluminum foil to shield ...

Use and Care Manual - Page 22

... paper plates with care because the Avoid using brown paper bags. Metal plates, cake plates, liquid utensils can cause arcing, which can damage your microwave oven. Cooking Utensils MICROWAVE UTENSIL GUIDE USE DO NOT USE OVEN PROOF GLASS (treated for METAL UTENSILS: high intensity heat): Metal shields the food from the heat They absorb too much heat and could burn.

Use and Care Manual - Page 23

... on food particles or liquids, heat two cups of water (add the juice of one or two minutes. • Remove the glass tray from breaking, handle it ; Use a damp cloth and mild soap. Do not use to lock. Rinse well and shake to the side. CHARCOAL FILTER REPLACEMENT If your oven. • Keep the inside...

Use and Care Manual - Page 25

...Move your TV or radio. it will display: PLEASE TOUCH CLOCK AND SET TIME OF DAY. own circuit. • Properly insert the plug into a grounded outlet. • ...replace any metallic utensils, cookware, or metal ties. If using foil, use only narrow strips and allow at least one inch between the foil and interior oven walls. • Reset the circuit breaker or replace any blown fuse...

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