PIC 16F1937 microchip

[Donny2derby]

Hi all. Hoping someone can help. There is an oil filled heater at work that is not running. The pump that fires the oil is not kicking in.

I've taken the PCB out the panel and found a board that is marked IPD-0018-E

It's receiving 230v ac and the output relay has 5v DC present. The various diodes and resistors etc all check out ok. The only thing seemingly left is the IC labelled as PIC 16F1937.

My question would be. How would I know this is the component causing the issue/how do I test? And should I simply order one and replace it? Or does it need programming out the box or ready to run? My limited knowledge of IC's leads me to think this would have to be flashed with the old one?

Any help appreciated.

Gareth.

[stj]

so is the heater and pump in parallel if it only has one relay?
does this thing have a display or any lights on it?
it could be the relay or relay driver - hopefully.
because the PIC has software in it.

[Donny2derby]

Apologies for the delay in getting back to you stj. I was working nights last weekend. On second inspection it does appear to be the relay as there's no 5v DC output from it. A new one has been ordered and is on a slow boat from china as we speak! I'll let you know the outcome.