Merco PD-4, Parts & Service Manual

TROUBLESHOOTING GUIDE

CONDITION

Doors do not open / close or do not open/
close fully.

Doors open, but toasting light remains illumi-
nated.

Doors held open by solenoids, and only close
when power is disconnected.

Light/Dark controlprovides no change in toast
color.

Heating elements do not light during toasting.

Toasting light does not illuminate when push-
to-toast button is depressed.

Push-to-toast button does not control the
toasting function.

Bread does not toast.

Heating elements glow immediately after
toaster is plugged in.

Noisy operation.

Flare-up of heating elements.

Heating elements are on and will not go off.

Heating elements on, toasting light off.

Bread is not delivered into the receiving tray at
the end of the toasting cycle.

Doors flutter

PROCEDURE

Check solenoids and timer. Check for loose or
improper wiring. If all of these prove correct,
Replace chassis assembly. (pre 1982 models
only)

Check wiring and timer.

Check reset button and timer.

Check timer, heating elements and wiring.

Check heating elements, relay, timer, push-to-
toast button. Check wiring.

Check toasting light, relay, timer. Check
wiring.

Check push-to-toast button, timer, relay,
heating elements. Check wiring.

Check plug/receptacle. Check all points listed
above.

Check timer and reset button.

Check for loose screws on solenoid mount
and chimney. Chinmey hitting rear panel of
toaster.

Possible insulator screw fragment contacting
the heating element. Check insulator for
cracks.

Check wiring, relay, timer and push-to-toast
button.

Check wiring, relay, and toasting light.

Check solenoids, timer, push-to-toast
button.Check wiring. Check that bread product
is not too thick.

Replace timer.