I just purchased a Heritage Mint Ltd Timepiece Quartz Regulator wall clock but it chimes two hours slower than the actual time. Need to know how to correct it. There is a red push button on the back of the clock but I do not know what it is for

clocks chime the hour
what is the point of having a clock that chimes every 2 hours because you will not know how long it was from the last chime or be able to calculate the time between chimes

without seeing the clock .....are you sure it isn't something as simple as the hands ( arms) detaching from the centre spindle which continues to turn but without the hands. Alternatively have the hands become stuck on something on the clock face or become intertwined themselves ? Very simplistic but all I have to offer...

take both hands off the clock wait till it chimes then put hands back on to the time it chimes at, then adjust to correct time.

Interesting question. I know little about watches but, as you would know, your watch does have a quartz movement, so, from Wikipedia, 'Quartz clock':

Standard-quality resonators of this type are warranted to have a long-term accuracy of about 6 parts per million at 31 degrees C (87.8 F): that is, a typical quartz wristwatch will gain or lose 15 seconds per 30 days (within a normal temperature range of 5 deg C / 41 F to 35 deg C / 95 F) or less than a half second clock drift per day when worn near the body.

If a quartz wristwatch is "rated" by measuring its timekeeping characteristics against an atomic clock's time broadcast, to determine how much time the watch gains or loses per day, and adjustments are made to the circuitry to "regulate" the timekeeping, then the corrected time will easily be accurate within 10 seconds per year. This is more than adequate to perform celestial navigation.

Assuming that you have a computer with internet-synced time and good internet, meaning around 1/100 second accuracy, why not compare the watch to the computer over the space of a week?

I'm afraid you have to visit clock repair shop, as without close inspection it is not possible to say what's wrong with your clock.

If it is like mine you press the test button until you hear the chime. Wait for the hour chime to go and count it. If it chimes once for 1PM and you need it set to 6PM then you press the test button to reset the chime and repeat press the button 5 times. This will set the chime to 6 PM. If you get lost on the time press until it makes no noise. This means you are 11PM or later and continue to then press until it makes noise again. Count the hour chimes and you are at the count in the AM. Repeat the steps and keep pressing to get to the proper AM or PM hour count..

These are general quartz wall clock instructions as I dont know enough about what type/style of clock you have.

Open the access door to the dial and hands of the clock if required. Some battery-operated clock movements are sealed inside the clock case with a back panel that is screwed in place. To gain access to the hand set knob, remove the back panel screws using the appropriate tipped screwdriver.

Turn the minute hand (or turn the hand set knob at the rear of the movement if access is available) carefully counterclockwise or clockwise until the correct time is reached. Keep in mind that using the hand set from the rear would require turning the knob in a clockwise direction in order for the hands to turn counterclockwise.

Move the hour hand carefully with your fingers near the center of the hand to the hour that the clock is striking if the striking chime is not counting the correct hour. The hour hand is a friction fit hand and will move without engaging the minute hand.

Replace the back panel and tighten the screws with the screwdriver if removal of the back panel was necessary to access the hand set knob.

Close the front access door if required.

You were not very specific about you clock description, Many of the German clocks were using auto correct features.

You may not have this function.

Move the hour hand to the correct hour.

Hope this tip help you.

R/
David
http://antiqueclock.clockstop.com/

Stop the pendulum of the clock exactly at any even hour. Lets say at 6.00. While clock is steady and not working, pull off the minute and hour hands off the pinion, but do not brake them. You have to pull without any twisting action. This will leave pinions exactly in place they were when you stopped the clock. When it is done - push the hour hand back onto the pinion and make sure it is pointing at 4 (not 6, as it was when you stopped the clock). When hour hand is back in place and pointing at 4, push back minute hand as it was when you pulled it off - pointing at 12. Make sure hands will not catch when passing each other (you can bend them slightly if needed). Now swing pendulum to start the clock and adjust time (clockwise only). Never adjust time when clock is chiming. Rate me, plz.