I have a holmes 1 touch model hqh319 electric heater.. would love to be able to clean the dust off the bottom metal inside the heater where the coils are unable to get to screws inside any suggestions?

To remove any dust, simply use a clean, dry cloth to wipe down the interior. Gently dust any media such as logs or glass inside your electric fireplace as well.

Cleaning Steps

1.Disconnect from Power Supply Before beginning to clean your electric fireplace, turn the heater off and allow to cool completely. Always disconnect the electric fireplace from the power supply before cleaning.
2.Check the Electrical Components Check any wires and plugs to make sure that they are not worn or frayed. This is a rare occurrence, but can become a fire hazard if not addressed. If this happens, consult a professional to repair or replace before using your electric fireplace again.
3.Clean the Heater With a clean, dry cloth, wipe down the surface of the heater. Using the soft brush attachment of a vacuum cleaner, gently clean the heater outlets. This will remove any dust or debris from the heater and keep it running at top performance.
4.Clean Both Sides of the Glass Follow the instructions in your owner's manual for removing the front glass panel. Once removed, you can clean both sides of the glass. Do not use abrasive cleaners, as they will scratch the glass. Dust can be easily removed with a clean, dry cloth. Fingerprints or other marks can be removed with a damp cloth; dry the glass with a lint free cloth to prevent water spots from forming.
5.Dust the Interior Dust may accumulate inside your electric fireplace, like any other unit in your home. To remove any dust, simply use a clean, dry cloth to wipe down the interior. Gently dust any media such as logs or glass inside your electric fireplace as well. When you are finished, place the front glass panel back onto your fireplace following the instructions in the owner's manual.
6.Remove the Soot Just kidding! You never have to worry about dirty, grimy soot with your electric fireplace. Instead, just relax and enjoy!

Check for ice / frosting inside the freezer .... If present you probably have a defrost problem.... This causes the freezer coil to ice up and block the air flow ... the causes could be a bad defrost heater , defrost timer, defrost sensors, or control board. Also make sure that the condenser coil is clean. remove ALL dust with a vacuum and a coil brush .the coil is located either on the bottom or on the back side of the unit... You didn't give the Make and model #

You would have to contact the makers of the heater to give you a clear answer on that , most heaters smell when first put on from new and you would have to burn this off first ,

if the heating element is staying on all the time the element is grounded,this is your problem the element coil is touching the metal casing or heater box and this is keeping the heat on all the time,this can pop the thermal fuse or high limit t-stat.your lint filter is on top,unplug the dryer pull it out away from the wall,remove the vent line and then the back wall,on the right side you'll see the metal duct with the heater box connected on the bottom,remove the two 1/4 inch screws and slide the heater out,but first if you have a meter remove one of the wires going to the heater and set your meter to 20k ohms,put one lead on the heater wire connector and the other onto the metal cover to ground the meter,if you get anything but 1 the element is grounded the coil is touching the metal box and grounding the heater out,do both sides of the element,then check the t-stats on the heater box one of them could be popped,also check the thermal fuse located over near the duct that the lint filter slides down into,it's a white piece part 3392519,check all the parts the same way,pull off at least one of the wires,touch the leads one on each side of the part you're checking,if you see 1 the part is bad or open if you see anything but 1 the part is good or closed,now while you're in there remove the 4 screws that hold the lint filter duct in place and up on top where you pull the filter out remove the two phillips screws,take the duct out and clean it also clean out the vent line,if it's a long run i use a leaf blower to blow out the vent line just stick it into the vent line where you removed it from dryer stick the blower into it and blow it outside you should do this like every 1 to 2 years so you don't have a fire and your clothes will dry on time,hope this helps,you can google how to take this dryer apart and clean out the inside too. more so if it's gas but yours is electric. go here put your model number in and look at bulkhead parts you can see all the parts in your dryer
https://www.searspartsdirect.com/model-number/LER3624JQ0/1198/0151200.html?searchType=modelSearch&q=ler3624jq0&searchTerm=ler3624jq0

Does the unit have a built in gfi plug? If it does and it won't reset I would replace the heater. It sounds like a dead short on the heater. It would not be cost affective to get it repaired.

if you have a vacume cleaner with blow on it blow the dust out , or a shop vac ,

get someone to have a look you may have damaged electrical or mechanical parts in heater and if its reseting and you can't get it to go at all there may be a good safety reason for this i always say if you haven't been taught to do something by a profesional don't learn by killing yourself as it is a possible out come for people how think they can fix it, you should know if you can fix and if you don't know don't fix even people with experiance still have trouble with heaters so don't risk it get a service agent there to look at problem or take it an appliance repair agent

Try fixya for the correct manual or webpage the brand name.

Hi: Those areas are designed to be warm to keep moisture from forming there(Moulion coil). When they get hot it means the fridge is over working. The condenser coils remove the heat from the fridge. When clogged the heat will leave anywhere it can. The moulion coil is the strip you described,and will overheat when the condenser coils wont disperse the heat. Most likely the coils need a good cleaning, on the bottom of the ref. Use a coil brush and a vacuum. Or even an air compressor to blow the dust and hair out; plan on dusting the house too. Pull the grill off the front and clean them. If real bad pull the panel of the lower back and clean it out too. Since you work in detroit the dust and hair on the coils would be like putting a blanket over your radiator. Parts would heat up. I hope it's just the coils. If a compressor is failing you can get the same symptoms. I hope it is the latter for you, as I'm in your boat also. I hope this helps, Jeff

This may seem too simple of an answer based on your extensive troubleshooting thus far, but the most common reason for cold air running of any electric dryer is a broken heater coil. This is simply a coil of wire that is heated to warm the air in the fan duct. These often overheat and break if the vent duct is blocked, too long, or has odd bends that can restrict flow. Recommend replacing heater coil and use smooth wall vent pipe. Avoid coil type flexible duct.