Equipment page · Freezer / refrigeration

Blizzard BF1SS open-stock freezer

Dedicated troubleshooting page for the Bunk Derby freezer used for frequently cooked stock. After an overnight defrost it recovered to about -15°C, but it should normally operate around -18°C to -22°C.

Start troubleshooting Open manual
Venue
Bunk Derby
Location
Open-stock freezer / frequently used cooking stock
Make / model
Blizzard BF1SS
Serial
6609 1420 2008 0511
PN
9214200062
Refrigerant
R290 · 130g
Rated temp range
-18°C to -22°C
Status
Open · not reaching target temp

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Streamlined issue brief

Not reaching temperature · Blizzard BF1SS

Quick diagnosis for the open-stock freezer that recovered only to about -15°C.

OpenDefrost helped, but cabinet still above -18°C target range

1. Symptoms and evidence

  • Frequently opened freezer used for cooking stock.
  • After overnight defrost, temperature improved to about -15°C.
  • Rated range is -18°C to -22°C, so performance is still short.
  • Photos confirm controller readings and rating label.

2. Suspects

  • Heavy door-opening/load pattern.
  • Evaporator ice/airflow restriction.
  • Dirty condenser or poor ventilation.
  • Door gasket/hinge issue.
  • Controller/probe error or sealed-system issue if basic checks pass.

3. Expand resources

Manual / how-to / error reference

BF1SS manual and product guide are saved on this page. Manual fault table lists ice, condenser dust, door seals, airflow, ambient heat, overloading and fan blockage.

Troubleshooting tests
  1. Confirm set point around -19°C.
  2. Run closed-door pull-down test with reduced stock.
  3. Compare display with independent thermometer.
  4. Clear fan vents and clean condenser.
  5. Paper-test gasket and watch if ice returns quickly.
Diagram / parts / sources

No specific replacement part chosen yet. Parts depend on test result: gasket, fan, controller/probe, condenser fan, or refrigeration engineer repair.

4. Updated solution/status

Open: troubleshoot usage/airflow/condenser/gasket first; call refrigeration engineer if it still cannot reach -18°C when lightly loaded and closed.

Issue history for this freezer

Choose the problem type

This is the dedicated equipment page for the Bunk Derby Blizzard BF1SS. Future repeat faults should be added here as separate issue branches.

Open · 2026-05-26

Not reaching target temperature after defrost

After overnight defrost, cabinet reaches about -15°C but should reach around -18°C to -22°C. Used as open-stock freezer, so door opening frequency is a major factor.

Open troubleshooting log

Door gasket / hinge

No confirmed gasket fault yet. Run paper/torch test if temp stalls.

Evaporator fan / airflow

Check if shelves/stock block internal fan or if ice returns on evaporator.

Condenser / ventilation

Check monthly condenser clean and rear/side airflow.

Controller / probe

Confirm set point and compare display against independent thermometer.

Sealed system

Engineer-only if all basic checks pass and it still will not pull down.

Current issue log · Not holding target temperature

Practical troubleshooting sequence

1Confirm set point: hold set for 3 seconds, check target is around -19°C, then save and wait.
2Run a clean pull-down test: empty/low stock, door closed for 2–4 hours, log display every 30 minutes.
3Check airflow: do not overload shelves, keep fan vents clear, leave gaps around stock and rear wall.
4Check condenser/ventilation: clean dust from condenser and ensure heat can escape around the unit.
5If still stuck around -15°C, check gasket/door, evaporator fan/ice pattern, probe accuracy, then call engineer.

Current interpretation

Defrost helped but did not fully solve

  • The freezer improved after a full overnight defrost, which suggests ice/airflow may have been part of the fault.
  • Only reaching -15°C means it is still above the rated -18°C to -22°C freezer range.
  • Because this is frequently opened for cooking stock, door-open load and warm product loading may be contributing.
  • If it cannot reach target when mostly empty with the door closed, suspect condenser, fan, gasket, probe/control, or refrigeration performance.

Best next test: run a closed-door pull-down test with stock reduced and vents clear, then compare display with an independent freezer thermometer.

Typical causes to check

Most common reasons a commercial freezer stalls around -15°C

  • Door opened too often: open-stock/freequently used freezers may struggle during busy periods. Check overnight closed-door temp separately.
  • Overloaded shelves: stock too close to the fan/rear wall blocks cold-air circulation.
  • Warm stock loaded: adding warm/ambient food makes the cabinet recover slowly.
  • Ice on evaporator: manual says too much evaporator ice can cause high/low temperature faults.
  • Dirty condenser: manual says a dust-blocked condenser can cause temperature faults; monthly cleaning is recommended, especially in warm kitchens.
  • Interrupted condenser airflow: unit too close to wall, boxed in, next to heat source, or poor ventilation.
  • Door not sealing: damaged gasket, hinge sag, door not closing fully, shelf/stock obstruction.
  • Evaporator fan problem: fan not spinning, blocked by ice, or airflow path restricted.
  • Controller/probe issue: display may be inaccurate; compare with an independent thermometer in a cup/box of frozen goods.
  • Sealed-system issue: low refrigerant/compressor/capillary fault if clean, defrosted, unloaded and ventilated but still cannot reach range.

Priority order

What I’d try first

  1. Check controller set point is actually -19°C.
  2. Run overnight/closed-door test with a thermometer inside.
  3. Reduce stock load and keep fan vents clear.
  4. Clean/check condenser and ventilation clearance.
  5. Check door seal, hinge and paper test.
  6. Inspect evaporator/fan for ice returning quickly.
  7. If still no improvement, book refrigeration engineer.

Open-stock usage advice

How to separate usage load from a real fault

  • Closed-door baseline: record temperature before service after being closed overnight.
  • Busy-period reading: record lowest/warmest display during peak use.
  • Recovery time: after busy use, door closed — it should pull back down steadily.
  • Stock rotation: keep a smaller working quantity in this freezer and store backup stock in a less-opened freezer.
  • Do not block fan: leave a visible air path around fan grille and rear wall.
  • Door discipline: open once, take several items, close fully; avoid standing with door open.

When to stop DIY checks

Call an engineer if…

  • It cannot reach -18°C when empty/low stock and closed.
  • Evaporator becomes a solid block of ice again quickly.
  • Condenser fan/compressor sounds abnormal or runs constantly hot.
  • Door seal is fine but cabinet still stalls at -15°C.
  • Error codes appear on the controller.

Evidence photos

Photos from Bunk Derby

Photos confirm the make/model label and observed temperature readings after defrosting.

Blizzard BF1SS control display showing -5.2°C
Controller photo during recovery / warm reading: about -5.2°C.
Blizzard BF1SS control display showing -15.1°C
After overnight defrost, cabinet reached about -15.1°C.
Blizzard BF1SS rating label
Rating label: Blizzard BF1SS, serial 6609 1420 2008 0511, R290 130g, -18°C to -22°C.

Manual / reference found

Blizzard BF1SS manual and product guide

I found the public BF1SS manual and product guide. The manual confirms the temperature range and lists common causes for “appliance turns on, but temperature is too high/low”.

MANUAL

Blizzard BF1SS manual

Includes set temperature instructions, manual defrost, condenser cleaning guidance, troubleshooting table and R290 safety warnings.

Open saved manual PDF Source: Blizzard Equipment public download.
GUIDE

BF1SS product guide

Confirms BF1SS as 650L ventilated GN freezer, R290, -18°C / -22°C, 2010 × 740 × 840mm, 13amp supply.

Open saved product guide PDF Source: Pentland Wholesale public download.
MANUAL NOTES

Manual fault table says check

Too much evaporator ice, condenser blocked with dust, doors not shut/seals damaged, heat source, interrupted condenser airflow, high ambient, unsuitable/hot food, overloaded cabinet, and blocked fan airflow.

Use this list before assuming sealed-system fault.
BF1SS manual page showing temperature and defrost instructions
Manual page: set temperature, manual defrost and condenser cleaning.
BF1SS manual page showing troubleshooting table
Manual page: troubleshooting table and technical specs.
BF1SS product guide page
Product guide: BF1SS range, size and temperature specification.

Copy/paste handover

Message for staff or refrigeration engineer

Use this when asking someone on site or an engineer to investigate.

Bunk Derby open-stock freezer issue.
Equipment: Blizzard BF1SS upright freezer, serial 6609 1420 2008 0511, PN 9214200062, R290 130g, rated -18°C to -22°C.
Symptom: freezer used for frequently accessed cooking stock is not reaching target temperature. After overnight defrost it improved and reached about -15°C, but target is around -19°C / rated freezer range -18°C to -22°C.
Please check set point, run a closed-door pull-down test with vents clear and stock reduced, compare display with independent freezer thermometer, inspect door gasket/hinge/paper-test, confirm evaporator fan and internal airflow, clean/check condenser and ventilation clearance, and inspect whether evaporator ice returns quickly. Manual lists common causes as too much evaporator ice, blocked condenser, damaged seals/doors not shut, heat source or interrupted condenser airflow, high ambient temperature, hot/unsuitable foodstuffs, overloaded cabinet, and blockages to fan airflow. If all basic checks pass and it still stalls around -15°C, refrigeration engineer to investigate compressor/sealed-system/control/probe fault. R290 flammable refrigerant — sealed-system work by qualified engineer only.