Thetford Midi Prima 130-700-720 Series
Official technical documentation and workshop diagnostics for Midi Prima.
Technical Specifications
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
N/A | Oven-grill does not ignite Possible Cause: Gas supply turned off, empty gas cylinder, or air in the gas line | Check that the gas supply is turned on, replace the gas cylinder, or bleed air from the gas lines by attempting ignition repeatedly. | DIY Safe |
N/A | Burner fails to stay lit after ignition Possible Cause: Control knob not held down long enough or thermocouple failure | Hold the control knob pressed down fully for approximately 10 to 15 seconds after ignition. If the problem persists, have repairs carried out by a specialist or contact an authorised service agent. | DIY Check / Tech Fallback |
Frequently Asked Questions
Q: What type of gas do I need?
Only operate the stove with the type of gas (propane or butane) and pressure, as indicated on the rating plate.
Q: What can I do when the flame goes off after igniting the oven?
If the burner has not lit within 15 seconds, release the knob and wait at least 1 minute before repeating the operation. If it still fails to ignite contact your dealer.
Q: Why is the cooking appliance too hot to touch?
The appliance is manufactured to heat food and as a result certain areas will become hot. Touchable surfaces like knobs and handles should remain within a safe touchable temperature. If you are concerned about these temperatures, please contact your dealer who can measure the temperatures to ensure they are correct.
Q: Why do I need to keep the door open for grilling?
The grill burner works efficiently with the correct circulation of gas and ambient air. Closing the door prevents the circulation of this air and can result in dangerous products of combustion.
Q: How does the grill function on my oven work?
Does your oven have a grill / grill function? Note that the grill function may only be operated with the grill door open. The following applies here: Grill switched on – grill door opened or tilted Grill switched off – grill door closed Note: More and more Thetford appliances with a grill have a safety device that prevents the grill from operating when the grill door is closed. As soon as the grill door is closed, the gas flame goes out.
Q: How can I clean my cooking appliance (stainless steel)?
Always remove any spills or contamination immediately after use with soap and hot water. Towel dry the surface with a soft cloth. Use a non-abrasive multi-purpose cream cleaner and a nylon scourer pad to clean more stubborn dirt or grease. Use a proprietary stainless steel cleaner or polish to remove superficial surface scratching.
Q: How can I clean my cooking appliance (glass / glass lid)?
Always remove any spills or contamination immediately after use with soap and hot water. Towel dry the surface with a soft cloth. Use a special glass cleaner to clean more stubborn dirt or grease.
Q: How can I clean my cooking appliance (enamelled)?
Always remove any spills or contamination immediately after use with soap and hot water. Towel dry the surface with a soft cloth. Use a non-abrasive multi-purpose cream cleaner to clean more stubborn dirt or grease.
Q: Why do the knobs fall off?
There may be a flat metal retaining clip that has broken from the knob. Please contact your dealer who can replace under warranty or supply this if the appliance is outside the 3 year warranty.
Q: What happens if the oven/grill doesn’t work?
If burner has not lit within 15 seconds, release knob and wait at least 1 minute before repeating operation. If it still fails to ignite, contact your dealer.
Q: Where can I get an extra shelf for my oven?
Spares are available from your local dealer or service centre. Spares are also available from a range of wholesaler outlets including Leisure Spares 01423 320009.
Q: My grill doesn’t appear to light in the middle.
It shouldn’t. This is the design to promote even cooking.
Q: My grill pan handle gets hot, what can I do?
The handle is detachable. It should be removed whilst the grill is in use.
Q: What are the requirements for installing the cooker?
The cooker should be installaed as per the manufactures recommended installation instructions and should only be installed by competent qualified persons. Local laws should be adhered to when installing gas appliances.