Owner’s manual
Error Codes
What are the main 5 parts of a refrigerator?
The five main parts that make a refrigerator cool are the compressor, condenser, expansion device, evaporator, and a temperature-sensing control (often a thermistor). In a Hotpoint HPS18BTHJRBB, these parts work together to move heat out of the fresh food and freezer compartments.
The “main 5” and what each one does
- Compressor: pumps refrigerant through the sealed system and creates the pressure difference needed for cooling.
- Condenser: releases heat to the room as refrigerant condenses back into a liquid.
- Expansion device (capillary tube or valve): drops refrigerant pressure so it can get cold.
- Evaporator: absorbs heat inside the refrigerator as refrigerant boils/evaporates.
- Thermistor/temperature control: senses temperature and helps regulate run time and cooling level.
Other parts that matter (and commonly fail)
Even though they are not always counted in the “main 5,” these parts strongly affect cooling performance and day-to-day use:
- Evaporator fan: circulates cold air through the compartments (see refrigerator evaporator fan WR60X31522).
- Condenser fan: moves air across the condenser to dump heat.
- Defrost heater: melts frost off the evaporator so airflow stays strong (see refrigerator defrost heater WR09X21107).
- Door gasket: keeps warm, moist air out (see refrigerator door gasket WR14X27235).
Quick symptom-to-part guide
| Symptom | Most likely system area | Common related parts |
|---|---|---|
| Warm fridge and freezer | Sealed system or airflow | compressor, fans, condenser |
| Freezer cold, fridge warm | Airflow/defrost | evaporator fan, defrost heater |
| Frost buildup on back wall | Defrost system | defrost heater, controls |
| Moisture, sweating, poor temps | Air leaks | door gasket |
Why it matters
Knowing these core parts helps you troubleshoot faster: most “not cooling” complaints come from airflow (fans, frost/defrost) or heat rejection (dirty condenser area) rather than the sealed system itself.
Where to confirm model-specific details
For control settings, shelf handling, and safety steps (including unplugging before service), use the owner's manual. For ordering parts for HPS18BTHJRBB, shop the parts list for this model or search by model number on Sears PartsDirect.
Last updated: February 2026
What are the most commonly replaced parts in a refrigerator?
For the Hotpoint HPS18BTHJRBB top-mount refrigerator, the most commonly replaced parts are the ones that affect cooling, sealing, and everyday use: door gaskets, fan motors, defrost components, water/ice parts, and interior items like shelves and light bulbs. Use the owner's manual for model-specific safety steps before servicing.
Common parts that fail first (and what you’ll notice)
- Door gasket: warm spots, moisture, or frost from air leaks
- Evaporator fan: weak cooling in the fresh food section, unusual fan noise
- Defrost heater: heavy frost on the evaporator, warming temperatures
- Water inlet valve (if equipped): no ice, slow fill, or leaking at the back
- Light bulb / door switch: interior light not working when the door opens
- Shelves and door rails: cracks, sagging, or broken mounting tabs
Model-relevant examples from parts available for HPS18BTHJRBB
| Symptom | Likely part category | Example part on this model |
|---|---|---|
| Door not sealing, condensation | Door gasket | Refrigerator door gasket WR14X27235 |
| Warm fridge, fan noise | Evaporator fan motor | Refrigerator evaporator fan WR60X31522 |
| Frost buildup, poor airflow | Defrost heat system | Refrigerator defrost heater WR09X21107 |
| No ice or water fill issues | Water valve | Refrigerator water inlet valve WR57X39965 |
| No interior light | Light bulb / switch | G.e. appliance light bulb, 40-watt 40A15 |
Quick checks before you buy a part
- Unplug the refrigerator before replacing parts or even changing a bulb (controls set to OFF do not remove power).
- Confirm the symptom: cooling problems often point to airflow (fans, frost) before major sealed-system parts.
- Inspect the gasket: look for gaps, tears, or areas that do not grip the cabinet.
- Listen for fans: evaporator fan noise usually comes from the freezer area behind the rear panel.
- If you have an ice maker/water line: check for kinks and verify the shutoff valve is fully open.
Why it matters
Replacing the correct “high-wear” part first (gasket, fan, defrost component, valve, or light/door switch) restores temperature control and efficiency faster, and it prevents food spoilage and excess frost or moisture.
You can order replacement parts for your Hotpoint HPS18BTHJRBB from the parts list for this model, or search by model number on Sears PartsDirect.
Last updated: February 2026
Can I replace fridge parts myself?
Yes, for the Hotpoint HPS18BTHJRBB top-mount refrigerator, we recommend DIY replacement for many common, non-sealed-system parts (like shelves, door gaskets, door switches, and light bulbs) as long as you unplug the refrigerator first and reinstall all panels before powering back on; use the owner's manual for model-specific safety steps.
What you can usually replace yourself
These repairs are typically straightforward with basic hand tools and careful handling:
- Light bulb (unplug first); a common replacement is the g.e. appliance light bulb, 40-watt 40A15
- Door switch (fixes lights not turning on or fan behavior changes when the door opens); see refrigerator door switch WR23X31507
- Door gasket (helps with warm temps, frost, and moisture); see refrigerator door gasket WR14X27235 or refrigerator door gasket WR14X27234
- Shelves and door rails (cracks, missing rails, poor fit)
- Ice maker kit add-on or replacement (keep hands clear of the mechanism when plugged in)
Repairs we do not recommend as DIY
Some work involves higher shock risk, specialized tools, or refrigerant handling:
- Sealed-system work (compressor, refrigerant lines, evaporator tubing)
- Complex electrical diagnosis with live-voltage testing
- Major wiring harness repairs behind panels
Quick guide: DIY-friendly vs. pro-level
| Repair type | Typical difficulty | Why |
|---|---|---|
| Light bulb, shelves, door rails | Easy | Minimal disassembly |
| Door gasket, door switch | Medium | Alignment and fit matter |
| Fans, controls, wiring, compressor | Hard | Electrical and system complexity |
Safety steps we follow before any repair
The manual’s safety guidance is clear: power is not removed by control settings alone.
- Unplug the refrigerator before replacing parts, cleaning, or removing panels
- Do not damage wiring when a panel is off
- Replace all parts and panels before plugging the unit back in
- Pull the refrigerator straight out (avoid rolling over the power cord or water line, if equipped)
Why it matters
DIY part replacement can restore cooling performance, reduce energy waste from air leaks, and prevent repeat issues like frost buildup or warm fresh-food temperatures. Using the correct Hotpoint-compatible part for HPS18BTHJRBB also helps ensure proper fit and safe operation.
To order parts listed for this model or search by model number, use the parts list for HPS18BTHJRBB or visit Sears PartsDirect.
Last updated: February 2026
Why is my Hotpoint fridge not cooling but freezer is fine?
When your Hotpoint HPS18BTHJRBB freezer is cold but the fresh-food section is warm, the most common cause is an airflow problem: cold air is being made in the freezer but is not being moved into the refrigerator compartment. This is often tied to frost buildup on the evaporator area or a weak/failed evaporator fan.
Quick checks (no tools)
- Make sure the temperature control is not set to Off; adjust toward Colder/Coldest as needed (the control changes overall cooling). See the HPS18BTHJRBB owner's manual.
- Confirm food packages are not blocking the air vents between the freezer and refrigerator sections.
- Listen for the evaporator fan: when the freezer door is closed, you should typically hear a fan running.
- Check for heavy frost on the freezer back wall; thick frost points to a defrost problem.
- Verify doors seal tightly; warm air leaks can cause frost that blocks airflow.
Most likely causes and what they look like
| Symptom | Most likely cause | What to do next |
|---|---|---|
| Freezer cold, fridge warm, little or no airflow | Evaporator fan not running | Inspect/replace the refrigerator evaporator fan WR60X31522 |
| Freezer back wall packed with frost | Defrost system issue | Test/replace the refrigerator defrost heater WR09X21107 and check defrost components per the manual |
| Light does not respond to door opening/closing | Door switch issue | Check/replace the refrigerator door switch WR23X31507 |
| Frost and moisture around doors | Door gasket not sealing | Inspect/replace the refrigerator door gasket WR14X27235 if torn or deformed |
Why it matters
On top-mount refrigerators like the HPS18BTHJRBB, the freezer evaporator is the cooling source for both compartments. If frost blocks the evaporator or the evaporator fan cannot push air through the ducts, the freezer can stay cold while the refrigerator section warms up.
Helpful DIY guidance
For step-by-step troubleshooting of airflow issues, use our guide: how to fix your evaporator cooling fan.
Ordering the right parts
We list model-matched replacement parts for HPS18BTHJRBB on this page; you can also search by model number on Sears PartsDirect.
Last updated: February 2026
